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.codecov.yml

@@ -1,46 +0,0 @@
-# see https://docs.codecov.io/docs/codecov-yaml
-# Validation check:
-# $ curl --data-binary @.codecov.yml https://codecov.io/validate
-
-codecov:
-  notify:
-    require_ci_to_pass: yes
-
-coverage:
-  precision: 0  # 2 = xx.xx%, 0 = xx%
-  round: nearest # how coverage is rounded: down/up/nearest
-  range: 40...100 # custom range of coverage colors from red -> yellow -> green
-  status:
-    # https://codecov.readme.io/v1.0/docs/commit-status
-    project:
-      default:
-        against: auto
-        target: 99% # specify the target coverage for each commit status
-        threshold: 20% # allow this little decrease on project
-        # https://github.com/codecov/support/wiki/Filtering-Branches
-        # branches: master
-        if_ci_failed: error
-    # https://github.com/codecov/support/wiki/Patch-Status
-    patch:
-      default:
-        against: auto
-        target: 40% # specify the target "X%" coverage to hit
-        # threshold: 50% # allow this much decrease on patch
-    changes: false
-
-parsers:
-  gcov:
-    branch_detection:
-      conditional: true
-      loop: true
-      macro: false
-      method: false
-  javascript:
-    enable_partials: false
-
-comment:
-  layout: header, diff
-  require_changes: false
-  behavior: default  # update if exists else create new
-  # branches: *
-

.github/CODE_OF_CONDUCT.md

@@ -1,76 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, sex characteristics, gender identity and expression,
-level of experience, education, socio-economic status, nationality, personal
-appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment
-include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or
- advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic
- address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a
- professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable
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-response to any instances of unacceptable behavior.
-
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-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
-threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community. Examples of
-representing a project or community include using an official project e-mail
-address, posting via an official social media account, or acting as an appointed
-representative at an online or offline event. Representation of a project may be
-further defined and clarified by project maintainers.
-
-## Enforcement
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-Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at waf2107@columbia.edu. All
-complaints will be reviewed and investigated and will result in a response that
-is deemed necessary and appropriate to the circumstances. The project team is
-obligated to maintain confidentiality with regard to the reporter of an incident.
-Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
-
-[homepage]: https://www.contributor-covenant.org
-
-For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq

.github/CONTRIBUTING.md

@@ -1,42 +0,0 @@
-# Contributing    
-Welcome to the PyTorch Lightning community! We're building the most advanced research platform on the planet to implement the latest, best practices that the amazing PyTorch team rolls out!   
-
-## One less thing to remember    
-Simplify the API as much as possible from the user perspective. Any additions or improvements should minimize things the user needs to remember.   
-
-For example: One benefit of the validation_step is that the user doesn't have to remember to set the model to .eval(). This avoids all sorts of subtle errors the user could make.   
-
-## Lightning Design Principles   
-We encourage all sorts of contributions you're interested in adding! When coding for lightning, please follow these principles.    
-
-#### No PyTorch interference   
-We don't want to add any abstractions on top of pure PyTorch. This gives researchers all the control they need without having to learn yet another framework.    
-
-#### Simple Internal Code    
-It's useful for users to look at the code and understand very quickly what's happening. Many users won't be engineers. Thus we need to value clear, simple code over condensed ninja moves. While that's super cool, this isn't the project for that :)      
-
-#### Force User Decisions To Best Practices    
-There are 1,000 ways to do something. However, something eventually becomes standard practice that everyone does. Thus we pick one way of doing it and force everyone to do it this way. A good example is accumulated gradients. There are many ways to implement, we just pick one and force users to use that one. A bad forced decision would be to make users use a specific library to do something.    
-
-When something becomes a best practice, we add it to the framework. This likely looks like code in utils or in the model file that everyone keeps adding over and over again across projects. When this happens, bring that code inside the trainer and add a flag for it.
-
-#### Simple External API    
-What makes sense to you may not make sense to others. Create an issue with an API change suggestion and validate that it makes sense for others. Treat code changes how you treat a startup: validate that it's a needed feature, then add if it makes sense for many people.    
-
-#### Gain User Trust    
-As a researcher you can't have any part of your code going wrong. So, make thorough tests that ensure an implementation of a new trick or subbtle change is correct.    
-
-## Contribution types    
-Currently looking for help implementing new features or adding bug fixes. 
-
-A lot of good work has already been done in project mechanics (requirements.txt, setup.py, pep8, badges, ci, etc...) we're in a good state there thanks to all the early contributors (even pre-beta release)!   
-
-## Bug fixes:  
-1. Submit a github issue.   
-2. Fix it.  
-3. Submit a PR! 
-
-## New Features:  
-1. Submit a github issue.   
-2. We'll agree on the feature scope.     
-3. Submit a PR! (with updated docs and tests 🙃).   

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,36 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: ''
-labels: bug
-assignees: ''
-
----
-
-### Common bugs:
-1. Tensorboard not showing in Jupyter-notebook see [issue 79](https://github.com/williamFalcon/pytorch-lightning/issues/79).    
-2. PyTorch 1.1.0 vs 1.2.0 support [see FAQ](https://github.com/williamFalcon/pytorch-lightning#faq)    
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-**To Reproduce**
-Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-
-**Expected behavior**
-A clear and concise description of what you expected to happen.
-
-**Screenshots**
-If applicable, add screenshots to help explain your problem.
-
-**Desktop (please complete the following information):**
- - OS: [e.g. iOS]
- - Browser [e.g. chrome, safari]
- - Version [e.g. 22]
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,20 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: enhancement, help wanted
-assignees: ''
-
----
-
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/how-to-question.md

@@ -1,26 +0,0 @@
----
-name: How to question
-about: Asking how-to questions
-title: ''
-labels: question
-assignees: ''
-
----
-
-### Before asking:   
-1. search the issues.   
-2. search the docs.    
-
-If you still can't find what you need:     
-#### What is your question?    
-
-#### Code    
-Please paste a code snippet if your question requires it!   
-
-#### What have you tried?    
-
-#### What's your environment?   
-- conda version (no venv)   
-- PyTorch version   
-- Lightning version   
-- Test-tube version

.github/ISSUE_TEMPLATE/typos-and-doc-fixes.md

@@ -1,17 +0,0 @@
----
-name: Typos and doc fixes
-about: Typos and doc fixes
-title: ''
-labels: typo
-assignees: ''
-
----
-
-For typos and doc fixes, please go ahead and:
-
-1. Create an issue.
-2. Fix the typo.   
-3. Submit a PR.
-
-
-Thanks!

.gitignore

@@ -1,125 +0,0 @@
-# project
-.DS_Store
-.data/
-run_configs/
-test_tube_logs/
-test_tube_data/
-datasets/
-model_weights/
-app/models/
-pip-wheel-metadata/
-test_tube_exp/
-tests/tests_tt_dir/
-tests/save_dir
-default/
-
-# Byte-compiled / optimized / DLL files
-__pycache__/
-*.py[cod]
-*$py.class
-example.py
-timit_data/
-LJSpeech-1.1/
-
-# C extensions
-*.so
-
-.idea/
-
-# Distribution / packaging
-.Python
-env/
-ide_layouts/
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-*.egg-info/
-.installed.cfg
-*.egg
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*.cover
-.hypothesis/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-docs/_build/
-
-# PyBuilder
-target/
-
-# Jupyter Notebook
-.ipynb_checkpoints
-
-# pyenv
-.python-version
-
-# celery beat schedule file
-celerybeat-schedule
-
-# SageMath parsed files
-*.sage.py
-
-# dotenv
-.env
-
-# virtualenv
-.venv
-venv/
-ENV/
-
-# Spyder project settings
-.spyderproject
-.spyproject
-
-# Rope project settings
-.ropeproject
-
-# mkdocs documentation
-/site
-
-# mypy
-.mypy_cache/
-
-# data
-mnist/

.readthedocs.yml

@@ -1,19 +0,0 @@
-# .readthedocs.yml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
-version: 2
-
-# Build documentation with MkDocs
-mkdocs:
-  configuration: mkdocs.yml
-
-# Optionally build your docs in additional formats such as PDF and ePub
-formats: all
-
-# Optionally set the version of Python and requirements required to build your docs
-python:
-  version: 3.7
-  install:
-    - requirements: docs/requirements.txt

.travis.yml

@@ -1,46 +0,0 @@
-# vim ft=yaml
-
-# After changing this file, check it on:
-#   http://yaml-online-parser.appspot.com/
-
-# See doc/travis_notes.txt for some guidelines
-
-# this file is *not* meant to cover or endorse the use of travis, but rather to
-# help confirm pull requests to this project.
-
-dist: xenial  # Ubuntu 16.04
-
-env:
-  global:
-    - DISPLAY=""
-
-language: python
-
-matrix:
-  include:
-    - python: 3.6
-      env: TOXENV=py36
-    - python: 3.7
-      env: TOXENV=py37
-
-# See http://docs.travis-ci.com/user/caching/#pip-cache
-cache: pip
-
-install:
-  - pip install -r requirements.txt
-  - pip install -r ./tests/requirements.txt
-  - pip --version ; pip list
-
-script:
-  # integration
-  - tox --sitepackages
-  - python setup.py install --dry-run
-
-after_success:
-  - coverage report
-  # disable auto coverage bc it isn't accurate since it misses gpu code.
-  # to get coverage, run local and push results
-  # - codecov
-
-notifications:
-  email: false

404.html

@@ -0,0 +1,510 @@
+
+
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+
+<!doctype html>
+<html lang="en" class="no-js">
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+              
+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/LightningModule/methods.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Methods</h1>
+                
+                <p>Lightning modules are strict superclasses of torch.nn.Module. A LightningModule offers the following in addition to that API.</p>
+<hr />
+<h3 id="freeze">freeze</h3>
+<p>Freeze all params for inference</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>
+<span class="n">model</span><span class="o">.</span><span class="n">freeze</span><span class="p">()</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h3 id="load_from_metrics">load_from_metrics</h3>
+<p>This is the easiest/fastest way which loads hyperparameters and weights from a checkpoint,
+such as the one saved by the <code>ModelCheckpoint</code> callback</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6
+7
+8</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">pretrained_model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="o">.</span><span class="n">load_from_checkpoint</span><span class="p">(</span>
+    <span class="n">checkpoint_path</span><span class="o">=</span><span class="s1">&#39;/path/to/pytorch_checkpoint.ckpt&#39;</span>
+<span class="p">)</span>
+
+<span class="c1"># predict</span>
+<span class="n">pretrained_model</span><span class="o">.</span><span class="n">eval</span><span class="p">()</span>
+<span class="n">pretrained_model</span><span class="o">.</span><span class="n">freeze</span><span class="p">()</span>
+<span class="n">y_hat</span> <span class="o">=</span> <span class="n">pretrained_model</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h3 id="load_from_metrics_1">load_from_metrics</h3>
+<p>If you're using test tube, there is an alternate method which uses the meta_tags.csv
+file from test-tube to rebuild the model. The meta_tags.csv file can be found in the
+test-tube experiment save_dir.       </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">pretrained_model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="o">.</span><span class="n">load_from_metrics</span><span class="p">(</span>
+    <span class="n">weights_path</span><span class="o">=</span><span class="s1">&#39;/path/to/pytorch_checkpoint.ckpt&#39;</span><span class="p">,</span>
+    <span class="n">tags_csv</span><span class="o">=</span><span class="s1">&#39;/path/to/test_tube/experiment/version/meta_tags.csv&#39;</span><span class="p">,</span>
+    <span class="n">on_gpu</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
+    <span class="n">map_location</span><span class="o">=</span><span class="bp">None</span>
+<span class="p">)</span>
+
+<span class="c1"># predict</span>
+<span class="n">pretrained_model</span><span class="o">.</span><span class="n">eval</span><span class="p">()</span>
+<span class="n">pretrained_model</span><span class="o">.</span><span class="n">freeze</span><span class="p">()</span>
+<span class="n">y_hat</span> <span class="o">=</span> <span class="n">pretrained_model</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p><strong>Params</strong>    </p>
+<table>
+<thead>
+<tr>
+<th>Param</th>
+<th>description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>weights_path</td>
+<td>Path to a PyTorch checkpoint</td>
+</tr>
+<tr>
+<td>tags_csv</td>
+<td>Path to meta_tags.csv file generated by the test-tube Experiment</td>
+</tr>
+<tr>
+<td>on_gpu</td>
+<td>if True, puts model on GPU. Make sure to use transforms option if model devices have changed</td>
+</tr>
+<tr>
+<td>map_location</td>
+<td>A dictionary mapping saved weight GPU devices to new GPU devices</td>
+</tr>
+</tbody>
+</table>
+<p><strong>Returns</strong>    </p>
+<p>LightningModule - The pretrained LightningModule</p>
+<hr />
+<h3 id="unfreeze">unfreeze</h3>
+<p>Unfreeze all params for inference</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>
+<span class="n">model</span><span class="o">.</span><span class="n">unfreeze</span><span class="p">()</span>
+</pre></div>
+</td></tr></table>
+                
+                  
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+      
+        <li class="md-nav__item">
+  <a href="#current_epoch" title="current_epoch" class="md-nav__link">
+    current_epoch
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#dtype" title="dtype" class="md-nav__link">
+    dtype
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#logger" title="logger" class="md-nav__link">
+    logger
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#global_step" title="global_step" class="md-nav__link">
+    global_step
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#gradient_clip_val" title="gradient_clip_val" class="md-nav__link">
+    gradient_clip_val
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#on_gpu" title="on_gpu" class="md-nav__link">
+    on_gpu
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#trainer" title="trainer" class="md-nav__link">
+    trainer
+  </a>
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+    Debugging
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+  <a href="#example_input_array" title="example_input_array" class="md-nav__link">
+    example_input_array
+  </a>
+  
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+    <a href="../../Trainer/Distributed training/" title="Distributed training" class="md-nav__link">
+      Distributed training
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+                  <div class="md-sidebar__inner">
+                    
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+  
+  
+  
+    <label class="md-nav__title" for="__toc">Table of contents</label>
+    <ul class="md-nav__list" data-md-scrollfix>
+      
+        <li class="md-nav__item">
+  <a href="#current_epoch" title="current_epoch" class="md-nav__link">
+    current_epoch
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#dtype" title="dtype" class="md-nav__link">
+    dtype
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#logger" title="logger" class="md-nav__link">
+    logger
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#global_step" title="global_step" class="md-nav__link">
+    global_step
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#gradient_clip_val" title="gradient_clip_val" class="md-nav__link">
+    gradient_clip_val
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#on_gpu" title="on_gpu" class="md-nav__link">
+    on_gpu
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#trainer" title="trainer" class="md-nav__link">
+    trainer
+  </a>
+  
+</li>
+      
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+  <a href="#debugging" title="Debugging" class="md-nav__link">
+    Debugging
+  </a>
+  
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+      <ul class="md-nav__list">
+        
+          <li class="md-nav__item">
+  <a href="#example_input_array" title="example_input_array" class="md-nav__link">
+    example_input_array
+  </a>
+  
+</li>
+        
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+  
+</li>
+      
+      
+      
+      
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+  
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+                </div>
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+            
+          
+          <div class="md-content">
+            <article class="md-content__inner md-typeset">
+              
+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/LightningModule/properties.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Properties</h1>
+                
+                <p>A LightningModule has the following properties which you can access at any time</p>
+<hr />
+<h4 id="current_epoch">current_epoch</h4>
+<p>The current epoch   </p>
+<hr />
+<h4 id="dtype">dtype</h4>
+<p>Current dtype    </p>
+<hr />
+<h4 id="logger">logger</h4>
+<p>A reference to the logger you passed into trainer. 
+Passing a logger is optional. If you don't pass one in, Lightning will create one for you automatically.
+This logger saves logs to '''/os.getcwd()/lightning_logs'''</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">Trainer</span><span class="p">(</span><span class="n">logger</span><span class="o">=</span><span class="n">your_logger</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>Call it from anywhere in your LightningModule to add metrics, images, etc... whatever your logger supports.  </p>
+<p>Here is an example using the TestTubeLogger (which is a wrapper on <a href="https://pytorch.org/docs/stable/tensorboard.html">PyTorch SummaryWriter</a> with versioned folder structure).     </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># if logger is a tensorboard logger or TestTubeLogger</span>
+<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">experiment</span><span class="o">.</span><span class="n">add_embedding</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>   
+<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">experiment</span><span class="o">.</span><span class="n">log</span><span class="p">({</span><span class="s1">&#39;val_loss&#39;</span><span class="p">:</span> <span class="mf">0.9</span><span class="p">})</span>   
+<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">experiment</span><span class="o">.</span><span class="n">add_scalars</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>   
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="global_step">global_step</h4>
+<p>Total training batches seen across all epochs   </p>
+<hr />
+<h4 id="gradient_clip_val">gradient_clip_val</h4>
+<p>The current gradient clip value    </p>
+<hr />
+<h4 id="on_gpu">on_gpu</h4>
+<p>True if your model is currently running on GPUs. Useful to set flags around the LightningModule for different CPU vs GPU behavior.    </p>
+<hr />
+<h4 id="trainer">trainer</h4>
+<p>Last resort access to any state the trainer has. Changing certain properties here could affect your training run.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="bp">self</span><span class="o">.</span><span class="n">trainer</span><span class="o">.</span><span class="n">optimizers</span>
+<span class="bp">self</span><span class="o">.</span><span class="n">trainer</span><span class="o">.</span><span class="n">current_epoch</span>
+<span class="o">...</span>   
+</pre></div>
+</td></tr></table>
+
+<h2 id="debugging">Debugging</h2>
+<p>The LightningModule also offers these tricks to help debug.   </p>
+<hr />
+<h4 id="example_input_array">example_input_array</h4>
+<p>In the LightningModule init, you can set a dummy tensor for this property
+to get a print out of sizes coming into and out of every layer.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
+    <span class="c1"># put the dimensions of the first input to your system</span>
+    <span class="bp">self</span><span class="o">.</span><span class="n">example_input_array</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">rand</span><span class="p">(</span><span class="mi">5</span><span class="p">,</span> <span class="mi">28</span> <span class="o">*</span> <span class="mi">28</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+                
+                  
+                
+              
+              
+                
+
+
+              
+            </article>
+          </div>
+        </div>
+      </main>
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MANIFEST.in

@@ -1,37 +0,0 @@
-# Manifest syntax https://docs.python.org/2/distutils/sourcedist.html
-graft wheelhouse
-
-recursive-include birl *.py
-recursive-exclude __pycache__  *.py[cod] *.orig
-
-# Include the README
-include *.md
-
-# Include the license file
-include LICENSE
-
-exclude *.sh
-exclude *.toml
-exclude *.svg    
-recursive-include examples *.py
-recursive-include pytorch_lightning *.py
-
-# exclude tests from package
-recursive-exclude tests *
-exclude tests
-
-# Exclude the documentation files
-recursive-exclude docs *
-exclude docs
-
-# Include the Requirements
-include requirements.txt
-
-# Exclude build configs
-exclude *.yml
-
-prune .git
-prune .github
-prune notebook*
-prune temp*
-prune test*

README.md

@@ -1,418 +0,0 @@
-<div align="center">
-
-![Logo](./docs/source/_static/lightning_logo_small.png)
-
-# PyTorch Lightning
-
-**The PyTorch Keras for ML researchers. More control. Less boilerplate.**
-
-
-[![PyPI Status](https://badge.fury.io/py/pytorch-lightning.svg)](https://badge.fury.io/py/pytorch-lightning)
-[![PyPI Status](https://pepy.tech/badge/pytorch-lightning)](https://pepy.tech/project/pytorch-lightning)
-[![Build Status](https://travis-ci.org/williamFalcon/pytorch-lightning.svg?branch=master)](https://travis-ci.org/williamFalcon/pytorch-lightning)
-[![Build status](https://ci.appveyor.com/api/projects/status/rum89d7hq8l1kfye?svg=true)](https://ci.appveyor.com/project/Borda/pytorch-lightning)
-[![Coverage](https://github.com/williamFalcon/pytorch-lightning/blob/master/docs/source/_static/coverage.svg)](https://github.com/williamFalcon/pytorch-lightning/tree/master/tests#running-coverage)
-[![CodeFactor](https://www.codefactor.io/repository/github/borda/pytorch-lightning/badge)](https://www.codefactor.io/repository/github/borda/pytorch-lightning)    
-
-[![ReadTheDocs](https://readthedocs.org/projects/pytorch-lightning/badge/?version=latest)](https://pytorch-lightning.readthedocs.io/en/latest)
-[![Gitter](https://badges.gitter.im/PyTorch-Lightning/community.svg)](https://gitter.im/PyTorch-Lightning/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-[![license](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/williamFalcon/pytorch-lightning/blob/master/LICENSE)
-<!-- 
-removed until codecov badge isn't empy. likely a config error showing nothing on master.
-[![codecov](https://codecov.io/gh/Borda/pytorch-lightning/branch/master/graph/badge.svg)](https://codecov.io/gh/Borda/pytorch-lightning)
--->
-
-</div>
-
-Simple installation from PyPI
-```bash
-pip install pytorch-lightning  
-```
-
-## Docs   
-**[View the docs here](https://williamfalcon.github.io/pytorch-lightning/)**
-
-## What is it?  
-Lightning is a very lightweight wrapper on PyTorch. This means you don't have to learn a new library. To use Lightning, simply refactor your research code into the [LightningModule](https://github.com/williamFalcon/pytorch-lightning#how-do-i-do-use-it) format and Lightning will automate the rest. Lightning guarantees tested, correct, modern best practices for the automated parts.
-
-## Starting a new project?   
-[Use our seed-project aimed at reproducibility!](https://github.com/williamFalcon/pytorch-lightning-conference-seed)     
-
-## Why do I want to use lightning?
-Every research project starts the same, a model, a training loop, validation loop, etc. As your research advances, you're likely to need distributed training, 16-bit precision, checkpointing, gradient accumulation, etc.   
-
-Lightning sets up all the boilerplate state-of-the-art training for you so you can focus on the research.   
-
----   
-## README Table of Contents        
-- [How do I use it](https://github.com/williamFalcon/pytorch-lightning#how-do-i-do-use-it)     
-- [What lightning automates](https://github.com/williamFalcon/pytorch-lightning#what-does-lightning-control-for-me)    
-- [Tensorboard integration](https://github.com/williamFalcon/pytorch-lightning#tensorboard)    
-- [Lightning features](https://github.com/williamFalcon/pytorch-lightning#lightning-automates-all-of-the-following-each-is-also-configurable)    
-- [Demos](https://github.com/williamFalcon/pytorch-lightning#demo)    
-- [Tutorials](https://github.com/williamFalcon/pytorch-lightning#tutorials)
-- [Contributing](https://github.com/williamFalcon/pytorch-lightning/blob/master/CONTRIBUTING.md)    
-- [Bleeding edge install](https://github.com/williamFalcon/pytorch-lightning#bleeding-edge)   
-- [Lightning Design Principles](https://github.com/williamFalcon/pytorch-lightning#lightning-design-principles)   
-- [Asking for help](https://github.com/williamFalcon/pytorch-lightning#asking-for-help)
-- [FAQ](https://github.com/williamFalcon/pytorch-lightning#faq)    
-
----   
-## How do I do use it?   
-Think about Lightning as refactoring your research code instead of using a new framework. The research code goes into a [LightningModule]((https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/)) which you fit using a Trainer.    
-
-The LightningModule defines a *system* such as seq-2-seq, GAN, etc... It can ALSO define a simple classifier such as the example below.     
-
-To use lightning do 2 things:  
-1. [Define a LightningModule](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/)         
-```python
-import os
-import torch
-from torch.nn import functional as F
-from torch.utils.data import DataLoader
-from torchvision.datasets import MNIST
-import torchvision.transforms as transforms
-
-import pytorch_lightning as pl
-
-class CoolSystem(pl.LightningModule):
-
-    def __init__(self):
-        super(CoolSystem, self).__init__()
-        # not the best model...
-        self.l1 = torch.nn.Linear(28 * 28, 10)
-
-    def forward(self, x):
-        return torch.relu(self.l1(x.view(x.size(0), -1)))
-
-    def training_step(self, batch, batch_nb):
-        # REQUIRED
-        x, y = batch
-        y_hat = self.forward(x)
-        return {'loss': F.cross_entropy(y_hat, y)}
-
-    def validation_step(self, batch, batch_nb):
-        # OPTIONAL
-        x, y = batch
-        y_hat = self.forward(x)
-        return {'val_loss': F.cross_entropy(y_hat, y)}
-
-    def validation_end(self, outputs):
-        # OPTIONAL
-        avg_loss = torch.stack([x['val_loss'] for x in outputs]).mean()
-        return {'avg_val_loss': avg_loss}
-
-    def configure_optimizers(self):
-        # REQUIRED
-        # can return multiple optimizers and learning_rate schedulers
-        return torch.optim.Adam(self.parameters(), lr=0.02)
-
-    @pl.data_loader
-    def tng_dataloader(self):
-        # REQUIRED
-        return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=32)
-
-    @pl.data_loader
-    def val_dataloader(self):
-        # OPTIONAL
-        return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=32)
-
-    @pl.data_loader
-    def test_dataloader(self):
-        # OPTIONAL
-        return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=32)
-```
-
-2. Fit with a [trainer](https://williamfalcon.github.io/pytorch-lightning/Trainer/)    
-```python
-from pytorch_lightning import Trainer
-
-model = CoolSystem()
-
-# most basic trainer, uses good defaults
-trainer = Trainer()    
-trainer.fit(model)   
-```     
-
-Or with tensorboard logger and some options turned on such as multi-gpu, etc...    
-```python   
-from test_tube import Experiment    
-
-# PyTorch summarywriter with a few bells and whistles    
-exp = Experiment(save_dir=os.getcwd())
-
-# train on cpu using only 10% of the data (for demo purposes)
-# pass in experiment for automatic tensorboard logging.    
-trainer = Trainer(experiment=exp, max_nb_epochs=1, train_percent_check=0.1)
-
-# train on 4 gpus
-# trainer = Trainer(experiment=exp, max_nb_epochs=1, gpus=[0, 1, 2, 3])
-
-# train on 32 gpus across 4 nodes (make sure to submit appropriate SLURM job)
-# trainer = Trainer(experiment=exp, max_nb_epochs=1, gpus=[0, 1, 2, 3, 4, 5, 6, 7], nb_gpu_nodes=4)
-
-# train (1 epoch only here for demo)
-trainer.fit(model)
-
-# view tensorflow logs 
-print('View tensorboard logs by running\ntensorboard --logdir %s' % os.getcwd())
-print('and going to http://localhost:6006 on your browser')
-```    
-
-## What does lightning control for me?   
-
-Everything in gray!    
-You define the blue parts using the LightningModule interface:  
-
-![Ouverview](./docs/source/_static/overview_flat.jpg)
-
-```python
-# what to do in the training loop
-def training_step(self, data_batch, batch_nb):
-
-# what to do in the validation loop
-def validation_step(self, data_batch, batch_nb):
-
-# how to aggregate validation_step outputs
-def validation_end(self, outputs):
-
-# and your dataloaders
-def tng_dataloader():
-def val_dataloader():
-def test_dataloader():
-```
-
-**Could be as complex as seq-2-seq + attention**    
-
-```python
-# define what happens for training here
-def training_step(self, data_batch, batch_nb):
-    x, y = data_batch
-    
-    # define your own forward and loss calculation
-    hidden_states = self.encoder(x)
-     
-    # even as complex as a seq-2-seq + attn model
-    # (this is just a toy, non-working example to illustrate)
-    start_token = '<SOS>'
-    last_hidden = torch.zeros(...)
-    loss = 0
-    for step in range(max_seq_len):
-        attn_context = self.attention_nn(hidden_states, start_token)
-        pred = self.decoder(start_token, attn_context, last_hidden) 
-        last_hidden = pred
-        pred = self.predict_nn(pred)
-        loss += self.loss(last_hidden, y[step])
-        
-    #toy example as well
-    loss = loss / max_seq_len
-    return {'loss': loss} 
-```
-
-**Or as basic as CNN image classification**      
-
-```python
-# define what happens for validation here
-def validation_step(self, data_batch, batch_nb):    
-    x, y = data_batch
-    
-    # or as basic as a CNN classification
-    out = self.forward(x)
-    loss = my_loss(out, y)
-    return {'loss': loss} 
-```
-
-**And you also decide how to collate the output of all validation steps**    
-
-```python
-def validation_end(self, outputs):
-    """
-    Called at the end of validation to aggregate outputs
-    :param outputs: list of individual outputs of each validation step
-    :return:
-    """
-    val_loss_mean = 0
-    val_acc_mean = 0
-    for output in outputs:
-        val_loss_mean += output['val_loss']
-        val_acc_mean += output['val_acc']
-
-    val_loss_mean /= len(outputs)
-    val_acc_mean /= len(outputs)
-    tqdm_dic = {'val_loss': val_loss_mean.item(), 'val_acc': val_acc_mean.item()}
-    return tqdm_dic
-```
-   
-## Tensorboard    
-Lightning is fully integrated with tensorboard.   
-
-![tensorboard-support](./docs/source/_static/tf_loss.png)
-
-Lightning also adds a text column with all the hyperparameters for this experiment.      
-
-![tensorboard-support](./docs/source/_static/tf_tags.png)
-
-Simply note the path you set for the Experiment    
-```python
-from test_tube import Experiment
-from pytorch-lightning import  Trainer
-
-exp = Experiment(save_dir='/some/path')
-trainer = Trainer(experiment=exp)
-...
-```   
-
-And run tensorboard from that dir   
-```bash
-tensorboard --logdir /some/path     
-```    
-
-## Lightning automates all of the following ([each is also configurable](https://williamfalcon.github.io/pytorch-lightning/Trainer/)):
-
-
-###### Checkpointing    
-
-- [Model saving](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving)
-- [Model loading](https://williamfalcon.github.io/pytorch-lightning/LightningModule/methods/#load-from-metrics) 
-- [Restoring training session](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#restoring-training-session)
-
-###### Computing cluster (SLURM)    
-
-- [Running grid search on a cluster](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#running-grid-search-on-a-cluster) 
-- [Walltime auto-resubmit](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#walltime-auto-resubmit)   
-
-###### Debugging  
-
-- [Fast dev run](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#fast-dev-run)
-- [Inspect gradient norms](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#inspect-gradient-norms)
-- [Log GPU usage](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#Log-gpu-usage)
-- [Make model overfit on subset of data](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#make-model-overfit-on-subset-of-data)
-- [Print the parameter count by layer](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-the-parameter-count-by-layer)
-- [Print which gradients are nan](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-which-gradients-are-nan)
-- [Print input and output size of every module in system](https://williamfalcon.github.io/pytorch-lightning/LightningModule/properties/#example_input_array)
-
-
-###### Distributed training    
-
-- [16-bit mixed precision](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#16-bit-mixed-precision)
-- [Multi-GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-GPU)
-- [Multi-node](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-node)
-- [Single GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#single-gpu)
-- [Self-balancing architecture](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#self-balancing-architecture)
-
-
-###### Experiment Logging   
-
-- [Display metrics in progress bar](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#display-metrics-in-progress-bar)
-- [Log metric row every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#log-metric-row-every-k-batches)
-- [Process position](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#process-position)
-- [Tensorboard support](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#tensorboard-support)
-- [Save a snapshot of all hyperparameters](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#save-a-snapshot-of-all-hyperparameters) 
-- [Snapshot code for a training run](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#snapshot-code-for-a-training-run) 
-- [Write logs file to csv every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#write-logs-file-to-csv-every-k-batches)
-
-###### Training loop    
-
-- [Accumulate gradients](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#accumulated-gradients)
-- [Force training for min or max epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-training-for-min-or-max-epochs)
-- [Force disable early stop](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-disable-early-stop)
-- [Gradient Clipping](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#gradient-clipping)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Learning rate scheduling](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)    
-- [Use multiple optimizers (like GANs)](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)
-- [Set how much of the training set to check (1-100%)](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#set-how-much-of-the-training-set-to-check)
-- [Step optimizers at arbitrary intervals](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step)
-
-###### Validation loop    
-
-- [Check validation every n epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#check-validation-every-n-epochs)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Set how much of the validation set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-validation-set-to-check)
-- [Set how much of the test set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-test-set-to-check)
-- [Set validation check frequency within 1 training epoch](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-validation-check-frequency-within-1-training-epoch)
-- [Set the number of validation sanity steps](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-the-number-of-validation-sanity-steps)
-
-
-## Demo
-```bash
-# install lightning
-pip install pytorch-lightning
-
-# clone lightning for the demo
-git clone https://github.com/williamFalcon/pytorch-lightning.git
-cd pytorch-lightning
-cd examples/new_project_templates/
-
-# all of the following demos use the SAME model to show no modification needs to be made to your code
-
-# train on cpu 
-python single_cpu_template.py
-
-# train on multiple-gpus 
-python single_gpu_node_template.py --gpus "0,1"
-
-# train on 32 gpus on a cluster (run on a SLURM managed cluster)
-python multi_node_cluster_template.py --nb_gpu_nodes 4 --gpus '0,1,2,3,4,5,6,7'
-```
-
-## Tutorials   
-- [Basic Lightning use](https://towardsdatascience.com/supercharge-your-ai-research-with-pytorch-lightning-337948a99eec)    
-- [9 key speed features in Pytorch-Lightning](https://towardsdatascience.com/9-tips-for-training-lightning-fast-neural-networks-in-pytorch-8e63a502f565)    
-- [SLURM, multi-node training with Lightning](https://towardsdatascience.com/trivial-multi-node-training-with-pytorch-lightning-ff75dfb809bd)     
-
----    
-## Asking for help    
-Welcome to the Lightning community!   
-
-If you have any questions, feel free to:   
-1. [read the docs](https://williamfalcon.github.io/pytorch-lightning/).     
-2. [Search through the issues](https://github.com/williamFalcon/pytorch-lightning/issues?utf8=%E2%9C%93&q=my++question).      
-3. [Ask on stackoverflow](https://stackoverflow.com/questions/ask?guided=false) with the tag pytorch-lightning.   
-
-If no one replies to you quickly enough, feel free to post the stackoverflow link to our Gitter chat!   
-
-To chat with the rest of us visit our [gitter channel](https://gitter.im/PyTorch-Lightning/community?utm_source=share-link&utm_medium=link&utm_campaign=share-link)!     
-
----   
-## FAQ    
-**How do I use Lightning for rapid research?**   
-[Here's a walk-through](https://williamfalcon.github.io/pytorch-lightning/)  
-
-**Why was Lightning created?**     
-Lightning has 3 goals in mind:
-1. Maximal flexibility while abstracting out the common boilerplate across research projects.   
-2. Reproducibility. If all projects use the LightningModule template, it will be much much easier to understand what's going on and where to look! It will also mean every implementation follows a standard format.   
-3. Democratizing PyTorch power user features. Distributed training? 16-bit? know you need them but don't want to take the time to implement? All good... these come built into Lightning.    
-
-**How does Lightning compare with Ignite and fast.ai?**     
-[Here's a thorough comparison](https://medium.com/@_willfalcon/pytorch-lightning-vs-pytorch-ignite-vs-fast-ai-61dc7480ad8a).    
-
-**Is this another library I have to learn?**    
-Nope! We use pure Pytorch everywhere and don't add unecessary abstractions!   
-
-**Are there plans to support Python 2?**          
-Nope.     
-
-**Are there plans to support virtualenv?**    
-Nope. Please use anaconda or miniconda.    
-
-**Which PyTorch versions do you support?**    
-##### PyTorch 1.1.0       
-```bash    
-# install pytorch 1.1.0 using the official instructions   
-
-# install test-tube 0.6.7.6 which supports 1.1.0   
-pip install test-tube==0.6.7.6   
-
-# install latest Lightning version without upgrading deps    
-pip install -U --no-deps pytorch-lightning
-```     
-
-##### PyTorch 1.2.0   
-Install via pip as normal   
-
-## Bleeding edge
-If you can't wait for the next release, install the most up to date code with:  
-```bash
-pip install git+https://github.com/williamFalcon/pytorch-lightning.git@master --upgrade
-```

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+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/Checkpointing.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Checkpointing</h1>
+                
+                <p>Lightning can automate saving and loading checkpoints.</p>
+<hr />
+<h3 id="model-saving">Model saving</h3>
+<p>Checkpointing is enabled by default to the current working directory.
+To change the checkpoint path pass in :</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">Trainer</span><span class="p">(</span><span class="n">default_save_path</span><span class="o">=</span><span class="s1">&#39;/your/path/to/save/checkpoints&#39;</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>To modify the behavior of checkpointing pass in your own callback.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">pytorch_lightning.callbacks</span> <span class="kn">import</span> <span class="n">ModelCheckpoint</span>
+
+<span class="c1"># DEFAULTS used by the Trainer</span>
+<span class="n">checkpoint_callback</span> <span class="o">=</span> <span class="n">ModelCheckpoint</span><span class="p">(</span>
+    <span class="n">filepath</span><span class="o">=</span><span class="n">os</span><span class="o">.</span><span class="n">getcwd</span><span class="p">(),</span>
+    <span class="n">save_best_only</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
+    <span class="n">verbose</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
+    <span class="n">monitor</span><span class="o">=</span><span class="s1">&#39;val_loss&#39;</span><span class="p">,</span>
+    <span class="n">mode</span><span class="o">=</span><span class="s1">&#39;min&#39;</span><span class="p">,</span>
+    <span class="n">prefix</span><span class="o">=</span><span class="s1">&#39;&#39;</span>
+<span class="p">)</span>
+
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">checkpoint_callback</span><span class="o">=</span><span class="n">checkpoint_callback</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h3 id="restoring-training-session">Restoring training session</h3>
+<p>You might want to not only load a model but also continue training it. Use this method to
+restore the trainer state as well. This will continue from the epoch and global step you last left off.<br />
+However, the dataloaders will start from the first batch again (if you shuffled it shouldn't matter).   </p>
+<p>Lightning will restore the session if you pass a logger with the same version and there's a saved checkpoint.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15
+16</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">pytorch_lightning</span> <span class="kn">import</span> <span class="n">Trainer</span>
+<span class="kn">from</span> <span class="nn">pytorch_lightning.logging</span> <span class="kn">import</span> <span class="n">TestTubeLogger</span>
+
+<span class="n">logger</span> <span class="o">=</span> <span class="n">TestTubeLogger</span><span class="p">(</span>
+    <span class="n">save_dir</span><span class="o">=</span><span class="s1">&#39;./savepath&#39;</span><span class="p">,</span>
+    <span class="n">version</span><span class="o">=</span><span class="mi">1</span>  <span class="c1"># An existing version with a saved checkpoint</span>
+<span class="p">)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span>
+    <span class="n">logger</span><span class="o">=</span><span class="n">logger</span><span class="p">,</span>
+    <span class="n">default_save_path</span><span class="o">=</span><span class="s1">&#39;./savepath&#39;</span>
+<span class="p">)</span>
+
+<span class="c1"># this fit call loads model weights and trainer state</span>
+<span class="c1"># the trainer continues seamlessly from where you left off</span>
+<span class="c1"># without having to do anything else.</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>The trainer restores:  </p>
+<ul>
+<li>global_step    </li>
+<li>current_epoch    </li>
+<li>All optimizers    </li>
+<li>All lr_schedulers    </li>
+<li>Model weights</li>
+</ul>
+<p>You can even change the logic of your model as long as the weights and "architecture" of 
+the system isn't different. If you add a layer, for instance, it might not work.   </p>
+<p>At a rough level, here's <a href="https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/root_module/model_saving.py#L63">what happens inside Trainer</a>:   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="bp">self</span><span class="o">.</span><span class="n">global_step</span> <span class="o">=</span> <span class="n">checkpoint</span><span class="p">[</span><span class="s1">&#39;global_step&#39;</span><span class="p">]</span>
+<span class="bp">self</span><span class="o">.</span><span class="n">current_epoch</span> <span class="o">=</span> <span class="n">checkpoint</span><span class="p">[</span><span class="s1">&#39;epoch&#39;</span><span class="p">]</span>
+
+<span class="c1"># restore the optimizers</span>
+<span class="n">optimizer_states</span> <span class="o">=</span> <span class="n">checkpoint</span><span class="p">[</span><span class="s1">&#39;optimizer_states&#39;</span><span class="p">]</span>
+<span class="k">for</span> <span class="n">optimizer</span><span class="p">,</span> <span class="n">opt_state</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">optimizers</span><span class="p">,</span> <span class="n">optimizer_states</span><span class="p">):</span>
+    <span class="n">optimizer</span><span class="o">.</span><span class="n">load_state_dict</span><span class="p">(</span><span class="n">opt_state</span><span class="p">)</span>
+
+<span class="c1"># restore the lr schedulers</span>
+<span class="n">lr_schedulers</span> <span class="o">=</span> <span class="n">checkpoint</span><span class="p">[</span><span class="s1">&#39;lr_schedulers&#39;</span><span class="p">]</span>
+<span class="k">for</span> <span class="n">scheduler</span><span class="p">,</span> <span class="n">lrs_state</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">lr_schedulers</span><span class="p">,</span> <span class="n">lr_schedulers</span><span class="p">):</span>
+    <span class="n">scheduler</span><span class="o">.</span><span class="n">load_state_dict</span><span class="p">(</span><span class="n">lrs_state</span><span class="p">)</span>
+
+<span class="c1"># uses the model you passed into trainer        </span>
+<span class="n">model</span><span class="o">.</span><span class="n">load_state_dict</span><span class="p">(</span><span class="n">checkpoint</span><span class="p">[</span><span class="s1">&#39;state_dict&#39;</span><span class="p">])</span>
+</pre></div>
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+  <a href="#running-grid-search-on-a-cluster" title="Running grid search on a cluster" class="md-nav__link">
+    Running grid search on a cluster
+  </a>
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+</li>
+      
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+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/SLURM Managed Cluster.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>SLURM Managed Cluster</h1>
+                
+                <p>Lightning supports model training on a cluster managed by SLURM in the following cases:    </p>
+<ol>
+<li>Training on a single cpu or single GPU.</li>
+<li>Train on multiple GPUs on the same node using DataParallel or DistributedDataParallel</li>
+<li>Training across multiple GPUs on multiple different nodes via DistributedDataParallel.</li>
+</ol>
+<p><strong>Note: A node means a machine with multiple GPUs</strong></p>
+<hr />
+<h4 id="running-grid-search-on-a-cluster">Running grid search on a cluster</h4>
+<p>To use lightning to run a hyperparameter search (grid-search or random-search) on a cluster do 4 things:   </p>
+<p>(1). Define the parameters for the grid search    </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">test_tube</span> <span class="kn">import</span> <span class="n">HyperOptArgumentParser</span>
+
+<span class="c1"># subclass of argparse</span>
+<span class="n">parser</span> <span class="o">=</span> <span class="n">HyperOptArgumentParser</span><span class="p">(</span><span class="n">strategy</span><span class="o">=</span><span class="s1">&#39;random_search&#39;</span><span class="p">)</span>
+<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;--learning_rate&#39;</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="mf">0.002</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">float</span><span class="p">,</span> <span class="n">help</span><span class="o">=</span><span class="s1">&#39;the learning rate&#39;</span><span class="p">)</span>
+
+<span class="c1"># let&#39;s enable optimizing over the number of layers in the network</span>
+<span class="n">parser</span><span class="o">.</span><span class="n">opt_list</span><span class="p">(</span><span class="s1">&#39;--nb_layers&#39;</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">int</span><span class="p">,</span> <span class="n">tunable</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">options</span><span class="o">=</span><span class="p">[</span><span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">8</span><span class="p">])</span>
+
+<span class="n">hparams</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>    
+</pre></div>
+</td></tr></table>
+
+<p><strong>NOTE</strong> You must set <code>Tunable=True</code> for that argument to be considered in the permutation set. Otherwise
+test-tube will use the default value. This flag is useful when you don't want to search over an argument and
+want to use the default instead.   </p>
+<p>(2). Define the cluster options in the <a href="https://williamfalcon.github.io/test-tube/hpc/SlurmCluster/">SlurmCluster object</a> (over 5 nodes and 8 gpus)    </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">test_tube.hpc</span> <span class="kn">import</span> <span class="n">SlurmCluster</span>
+
+<span class="c1"># hyperparameters is a test-tube hyper params object</span>
+<span class="c1"># see https://williamfalcon.github.io/test-tube/hyperparameter_optimization/HyperOptArgumentParser/</span>
+<span class="n">hyperparams</span> <span class="o">=</span> <span class="n">args</span><span class="o">.</span><span class="n">parse</span><span class="p">()</span>
+
+<span class="c1"># init cluster</span>
+<span class="n">cluster</span> <span class="o">=</span> <span class="n">SlurmCluster</span><span class="p">(</span>
+    <span class="n">hyperparam_optimizer</span><span class="o">=</span><span class="n">hyperparams</span><span class="p">,</span>
+    <span class="n">log_path</span><span class="o">=</span><span class="s1">&#39;/path/to/log/results/to&#39;</span><span class="p">,</span>
+    <span class="n">python_cmd</span><span class="o">=</span><span class="s1">&#39;python3&#39;</span>
+<span class="p">)</span>
+
+<span class="c1"># let the cluster know where to email for a change in job status (ie: complete, fail, etc...)</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">notify_job_status</span><span class="p">(</span><span class="n">email</span><span class="o">=</span><span class="s1">&#39;some@email.com&#39;</span><span class="p">,</span> <span class="n">on_done</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">on_fail</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
+
+<span class="c1"># set the job options. In this instance, we&#39;ll run 20 different models</span>
+<span class="c1"># each with its own set of hyperparameters giving each one 1 GPU (ie: taking up 20 GPUs)</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">per_experiment_nb_gpus</span> <span class="o">=</span> <span class="mi">8</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">per_experiment_nb_nodes</span> <span class="o">=</span> <span class="mi">5</span>
+
+<span class="c1"># we&#39;ll request 10GB of memory per node</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">memory_mb_per_node</span> <span class="o">=</span> <span class="mi">10000</span>
+
+<span class="c1"># set a walltime of 10 minues</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">job_time</span> <span class="o">=</span> <span class="s1">&#39;10:00&#39;</span>
+</pre></div>
+</td></tr></table>
+
+<p>(3). Make a main function with your model and trainer. Each job will call this function with a particular
+hparams configuration.    </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">pytorch_lightning</span> <span class="kn">import</span> <span class="n">Trainer</span>
+
+<span class="k">def</span> <span class="nf">train_fx</span><span class="p">(</span><span class="n">trial_hparams</span><span class="p">,</span> <span class="n">cluster_manager</span><span class="p">,</span> <span class="n">_</span><span class="p">):</span>
+    <span class="c1"># hparams has a specific set of hyperparams</span>
+
+    <span class="n">my_model</span> <span class="o">=</span> <span class="n">MyLightningModel</span><span class="p">()</span>
+
+    <span class="c1"># give the trainer the cluster object</span>
+    <span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">()</span>
+    <span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">my_model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>(3). Start the grid/random search     </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># run the models on the cluster</span>
+<span class="n">cluster</span><span class="o">.</span><span class="n">optimize_parallel_cluster_gpu</span><span class="p">(</span>
+    <span class="n">train_fx</span><span class="p">,</span> 
+    <span class="n">nb_trials</span><span class="o">=</span><span class="mi">20</span><span class="p">,</span> 
+    <span class="n">job_name</span><span class="o">=</span><span class="s1">&#39;my_grid_search_exp_name&#39;</span><span class="p">,</span> 
+    <span class="n">job_display_name</span><span class="o">=</span><span class="s1">&#39;my_exp&#39;</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p><strong>NOTE</strong> nb_trials specifies how many of the possible permutations to use. If using <code>grid_search</code> it will use
+the depth first ordering. If using <code>random_search</code> it will use the first k shuffled options. FYI, random search
+has been shown to be just as good as any Bayesian optimization method when using a reasonable number of samples (60),
+<a href="http://www.jmlr.org/papers/volume13/bergstra12a/bergstra12a.pdf">see this paper for more information</a>.</p>
+<hr />
+<h4 id="walltime-auto-resubmit">Walltime auto-resubmit</h4>
+<p>Lightning automatically resubmits jobs when they reach the walltime. Make sure to set the SIGUSR1 signal in 
+your SLURM script.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># 90 seconds before training ends</span>
+<span class="c1">#SBATCH --signal=SIGUSR1@90</span>
+</pre></div>
+</td></tr></table>
+
+<p>When lightning receives the SIGUSR1 signal it will:
+1. save a checkpoint with 'hpc_ckpt' in the name.
+2. resubmit the job using the SLURM_JOB_ID  </p>
+<p>When the script starts again, Lightning will:
+1. search for a 'hpc_ckpt' checkpoint. 
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+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/Testing loop.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Testing loop</h1>
+                
+                <p>To ensure you don't accidentally use test data to guide training decisions Lightning makes running the test set deliberate.   </p>
+<hr />
+<h4 id="test">test</h4>
+<p>You have two options to run the test set. 
+First case is where you test right after a full training routine.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># run full training</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+
+<span class="c1"># run test set</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">test</span><span class="p">()</span>
+</pre></div>
+</td></tr></table>
+
+<p>Second case is where you load a model and run the test set   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="o">.</span><span class="n">load_from_metrics</span><span class="p">(</span>
+    <span class="n">weights_path</span><span class="o">=</span><span class="s1">&#39;/path/to/pytorch_checkpoint.ckpt&#39;</span><span class="p">,</span>
+    <span class="n">tags_csv</span><span class="o">=</span><span class="s1">&#39;/path/to/test_tube/experiment/version/meta_tags.csv&#39;</span><span class="p">,</span>
+    <span class="n">on_gpu</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span>
+    <span class="n">map_location</span><span class="o">=</span><span class="bp">None</span>
+<span class="p">)</span>
+
+<span class="c1"># init trainer with whatever options</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>
+
+<span class="c1"># test (pass in the model)</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">test</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>In this second case, the options you pass to trainer will be used when running the test set (ie: 16-bit, dp, ddp, etc...)  </p>
+                
+                  
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+    <a href="../SLURM Managed Cluster/" title="SLURM Managed Cluster" class="md-nav__link">
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+        
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+          
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+    <a href="../Testing loop/" title="Testing loop" class="md-nav__link">
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+      </label>
+    
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+      Training Loop
+    </a>
+    
+      
+<nav class="md-nav md-nav--secondary">
+  
+  
+  
+    <label class="md-nav__title" for="__toc">Table of contents</label>
+    <ul class="md-nav__list" data-md-scrollfix>
+      
+        <li class="md-nav__item">
+  <a href="#accumulated-gradients" title="Accumulated gradients" class="md-nav__link">
+    Accumulated gradients
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#force-training-for-min-or-max-epochs" title="Force training for min or max epochs" class="md-nav__link">
+    Force training for min or max epochs
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#early-stopping" title="Early stopping" class="md-nav__link">
+    Early stopping
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#force-disable-early-stop" title="Force disable early stop" class="md-nav__link">
+    Force disable early stop
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#gradient-clipping" title="Gradient Clipping" class="md-nav__link">
+    Gradient Clipping
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#inspect-gradient-norms" title="Inspect gradient norms" class="md-nav__link">
+    Inspect gradient norms
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#set-how-much-of-the-training-set-to-check" title="Set how much of the training set to check" class="md-nav__link">
+    Set how much of the training set to check
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#packed-sequences-as-inputs" title="Packed sequences as inputs" class="md-nav__link">
+    Packed sequences as inputs
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#truncated-back-propagation-through-time" title="Truncated Back Propagation Through Time" class="md-nav__link">
+    Truncated Back Propagation Through Time
+  </a>
+  
+</li>
+      
+      
+      
+      
+      
+    </ul>
+  
+</nav>
+    
+  </li>
+
+        
+          
+          
+          
+
+
+  <li class="md-nav__item">
+    <a href="../Validation loop/" title="Validation loop" class="md-nav__link">
+      Validation loop
+    </a>
+  </li>
+
+        
+          
+          
+          
+
+
+  <li class="md-nav__item">
+    <a href="../debugging/" title="Debugging" class="md-nav__link">
+      Debugging
+    </a>
+  </li>
+
+        
+          
+          
+          
+
+
+  <li class="md-nav__item">
+    <a href="../hooks/" title="Hooks" class="md-nav__link">
+      Hooks
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+</nav>
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+                <div class="md-sidebar__scrollwrap">
+                  <div class="md-sidebar__inner">
+                    
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+  
+  
+  
+    <label class="md-nav__title" for="__toc">Table of contents</label>
+    <ul class="md-nav__list" data-md-scrollfix>
+      
+        <li class="md-nav__item">
+  <a href="#accumulated-gradients" title="Accumulated gradients" class="md-nav__link">
+    Accumulated gradients
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#force-training-for-min-or-max-epochs" title="Force training for min or max epochs" class="md-nav__link">
+    Force training for min or max epochs
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#early-stopping" title="Early stopping" class="md-nav__link">
+    Early stopping
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#force-disable-early-stop" title="Force disable early stop" class="md-nav__link">
+    Force disable early stop
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#gradient-clipping" title="Gradient Clipping" class="md-nav__link">
+    Gradient Clipping
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#inspect-gradient-norms" title="Inspect gradient norms" class="md-nav__link">
+    Inspect gradient norms
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#set-how-much-of-the-training-set-to-check" title="Set how much of the training set to check" class="md-nav__link">
+    Set how much of the training set to check
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+  
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+    Packed sequences as inputs
+  </a>
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+      
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+  <a href="#truncated-back-propagation-through-time" title="Truncated Back Propagation Through Time" class="md-nav__link">
+    Truncated Back Propagation Through Time
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+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/Training Loop.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Training Loop</h1>
+                
+                <p>The lightning training loop handles everything except the actual computations of your model. To decide what will happen in your training loop, define the <a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#training_step">training_step function</a>.</p>
+<p>Below are all the things lightning automates for you in the training loop.</p>
+<hr />
+<h4 id="accumulated-gradients">Accumulated gradients</h4>
+<p>Accumulated gradients runs K small batches of size N before doing a backwards pass. The effect is a large effective batch size of size KxN.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT (ie: no accumulated grads)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">accumulate_grad_batches</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="force-training-for-min-or-max-epochs">Force training for min or max epochs</h4>
+<p>It can be useful to force training for a minimum number of epochs or limit to a max number</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">min_nb_epochs</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">max_nb_epochs</span><span class="o">=</span><span class="mi">1000</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="early-stopping">Early stopping</h4>
+<p>The trainer already sets up default early stopping for you.
+To modify this behavior, pass in your own EarlyStopping callback.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">pytorch_lightning.callbacks</span> <span class="kn">import</span> <span class="n">EarlyStopping</span>
+
+<span class="c1"># DEFAULTS used by Trainer</span>
+<span class="n">early_stop_callback</span> <span class="o">=</span> <span class="n">EarlyStopping</span><span class="p">(</span>
+    <span class="n">monitor</span><span class="o">=</span><span class="s1">&#39;val_loss&#39;</span><span class="p">,</span>
+    <span class="n">min_delta</span><span class="o">=</span><span class="mf">0.00</span><span class="p">,</span>
+    <span class="n">patience</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span>
+    <span class="n">verbose</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
+    <span class="n">mode</span><span class="o">=</span><span class="s1">&#39;min&#39;</span>
+<span class="p">)</span>
+
+<span class="c1"># without passing anything in, uses the default callback above</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">()</span>
+
+<span class="c1"># pass in your own to override the default callback</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">early_stop_callback</span><span class="o">=</span><span class="n">early_stop_callback</span><span class="p">)</span>
+
+<span class="c1"># pass in None to disable it</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">early_stop_callback</span><span class="o">=</span><span class="bp">None</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="force-disable-early-stop">Force disable early stop</h4>
+<p>To disable early stopping pass None to the early_stop_callback</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">early_stop_callback</span><span class="o">=</span><span class="bp">None</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="gradient-clipping">Gradient Clipping</h4>
+<p>Gradient clipping may be enabled to avoid exploding gradients.
+Specifically, this will <a href="https://pytorch.org/docs/stable/nn.html#torch.nn.utils.clip_grad_norm_">clip the gradient norm computed over all model parameters <em>together</em></a>.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT (ie: don&#39;t clip)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">gradient_clip_val</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
+
+<span class="c1"># clip gradients with norm above 0.5</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">gradient_clip_val</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="inspect-gradient-norms">Inspect gradient norms</h4>
+<p>Looking at grad norms can help you figure out where training might be going wrong.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT (-1 doesn&#39;t track norms)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">track_grad_norm</span><span class="o">=-</span><span class="mi">1</span><span class="p">)</span>
+
+<span class="c1"># track the LP norm (P=2 here)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">track_grad_norm</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="set-how-much-of-the-training-set-to-check">Set how much of the training set to check</h4>
+<p>If you don't want to check 100% of the training set (for debugging or if it's huge), set this flag.</p>
+<p>train_percent_check will be overwritten by overfit_pct if <code>overfit_pct &gt; 0</code></p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">train_percent_check</span><span class="o">=</span><span class="mf">1.0</span><span class="p">)</span>
+
+<span class="c1"># check 10% only</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">train_percent_check</span><span class="o">=</span><span class="mf">0.1</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="packed-sequences-as-inputs">Packed sequences as inputs</h4>
+<p>When using PackedSequence, do 2 things:
+1. return either a padded tensor in dataset or a list of variable length tensors in the dataloader collate_fn (example above shows the list implementation).  <br />
+2. Pack the sequence in forward or training and validation steps depending on use case.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># For use in dataloader</span>
+<span class="k">def</span> <span class="nf">collate_fn</span><span class="p">(</span><span class="n">batch</span><span class="p">):</span>
+    <span class="n">x</span> <span class="o">=</span> <span class="p">[</span><span class="n">item</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">batch</span><span class="p">]</span>
+    <span class="n">y</span> <span class="o">=</span> <span class="p">[</span><span class="n">item</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">batch</span><span class="p">]</span>
+    <span class="k">return</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span>
+
+<span class="c1"># In module</span>
+<span class="k">def</span> <span class="nf">training_step</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">batch</span><span class="p">,</span> <span class="n">batch_nb</span><span class="p">):</span>
+    <span class="n">x</span> <span class="o">=</span> <span class="n">rnn</span><span class="o">.</span><span class="n">pack_sequence</span><span class="p">(</span><span class="n">batch</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">enforce_sorted</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
+    <span class="n">y</span> <span class="o">=</span> <span class="n">rnn</span><span class="o">.</span><span class="n">pack_sequence</span><span class="p">(</span><span class="n">batch</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">enforce_sorted</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="truncated-back-propagation-through-time">Truncated Back Propagation Through Time</h4>
+<p>There are times when multiple backwards passes are needed for each batch. For example, it may save memory to use Truncated Back Propagation Through Time when training RNNs.</p>
+<p>When this flag is enabled each batch is split into sequences of size truncated_bptt_steps and passed to training_step(...) separately. A default splitting function is provided, however, you can override it for more flexibility. See <a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks#tbptt_split_batch">tbptt_split_batch</a>.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT (single backwards pass per batch)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">truncated_bptt_steps</span><span class="o">=</span><span class="bp">None</span><span class="p">)</span>
+
+<span class="c1"># (split batch into sequences of size 2)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">truncated_bptt_steps</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
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+      
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+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/Validation loop.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Validation loop</h1>
+                
+                <p>The lightning validation loop handles everything except the actual computations of your model. To decide what will happen in your validation loop, define the <a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#validation_step">validation_step function</a>.
+Below are all the things lightning automates for you in the validation loop.</p>
+<p><strong>Note</strong> <br />
+Lightning will run 5 steps of validation in the beginning of training as a sanity check so you don't have to wait until a full epoch to catch possible validation issues.</p>
+<hr />
+<h4 id="check-validation-every-n-epochs">Check validation every n epochs</h4>
+<p>If you have a small dataset you might want to check validation every n epochs</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">check_val_every_n_epoch</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="set-how-much-of-the-validation-set-to-check">Set how much of the validation set to check</h4>
+<p>If you don't want to check 100% of the validation set (for debugging or if it's huge), set this flag</p>
+<p>val_percent_check will be overwritten by overfit_pct if <code>overfit_pct &gt; 0</code></p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">val_percent_check</span><span class="o">=</span><span class="mf">1.0</span><span class="p">)</span>
+
+<span class="c1"># check 10% only</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">val_percent_check</span><span class="o">=</span><span class="mf">0.1</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="set-how-much-of-the-test-set-to-check">Set how much of the test set to check</h4>
+<p>If you don't want to check 100% of the test set (for debugging or if it's huge), set this flag</p>
+<p>test_percent_check will be overwritten by overfit_pct if <code>overfit_pct &gt; 0</code></p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">test_percent_check</span><span class="o">=</span><span class="mf">1.0</span><span class="p">)</span>
+
+<span class="c1"># check 10% only</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">test_percent_check</span><span class="o">=</span><span class="mf">0.1</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="set-validation-check-frequency-within-1-training-epoch">Set validation check frequency within 1 training epoch</h4>
+<p>For large datasets it's often desirable to check validation multiple times within a training loop.
+Pass in a float to check that often within 1 training epoch.
+Pass in an int k to check every k training batches. Must use an int if using 
+an IterableDataset.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6
+7
+8</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">val_check_interval</span><span class="o">=</span><span class="mf">0.95</span><span class="p">)</span>
+
+<span class="c1"># check every .25 of an epoch </span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">val_check_interval</span><span class="o">=</span><span class="mf">0.25</span><span class="p">)</span>
+
+<span class="c1"># check every 100 train batches (ie: for IterableDatasets or fixed frequency)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">val_check_interval</span><span class="o">=</span><span class="mi">100</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="set-the-number-of-validation-sanity-steps">Set the number of validation sanity steps</h4>
+<p>Lightning runs a few steps of validation in the beginning of training. This avoids crashing in the validation loop sometime deep into a lengthy training loop.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">nb_sanity_val_steps</span><span class="o">=</span><span class="mi">5</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>You can use <code>Trainer(nb_sanity_val_steps=0)</code> to skip the sanity check.</p>
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+  <a href="#fast-dev-run" title="Fast dev run" class="md-nav__link">
+    Fast dev run
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#inspect-gradient-norms" title="Inspect gradient norms" class="md-nav__link">
+    Inspect gradient norms
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#make-model-overfit-on-subset-of-data" title="Make model overfit on subset of data" class="md-nav__link">
+    Make model overfit on subset of data
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#print-the-parameter-count-by-layer" title="Print the parameter count by layer" class="md-nav__link">
+    Print the parameter count by layer
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#print-which-gradients-are-nan" title="Print which gradients are nan" class="md-nav__link">
+    Print which gradients are nan
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#log-gpu-usage" title="Log GPU usage" class="md-nav__link">
+    Log GPU usage
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+    Make model overfit on subset of data
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#print-the-parameter-count-by-layer" title="Print the parameter count by layer" class="md-nav__link">
+    Print the parameter count by layer
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#print-which-gradients-are-nan" title="Print which gradients are nan" class="md-nav__link">
+    Print which gradients are nan
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#log-gpu-usage" title="Log GPU usage" class="md-nav__link">
+    Log GPU usage
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+              
+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/debugging.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Debugging</h1>
+                
+                <p>These flags are useful to help debug a model.</p>
+<hr />
+<h4 id="fast-dev-run">Fast dev run</h4>
+<p>This flag is meant for debugging a full train/val/test loop. It'll activate callbacks, everything but only with 1 training and 1 validation batch.
+Use this to debug a full run of your program quickly</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">fast_dev_run</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="inspect-gradient-norms">Inspect gradient norms</h4>
+<p>Looking at grad norms can help you figure out where training might be going wrong.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT (-1 doesn&#39;t track norms)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">track_grad_norm</span><span class="o">=-</span><span class="mi">1</span><span class="p">)</span>
+
+<span class="c1"># track the LP norm (P=2 here)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">track_grad_norm</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="make-model-overfit-on-subset-of-data">Make model overfit on subset of data</h4>
+<p>A useful debugging trick is to make your model overfit a tiny fraction of the data.</p>
+<p>setting <code>overfit_pct &gt; 0</code> will overwrite train_percent_check, val_percent_check, test_percent_check</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT don&#39;t overfit (ie: normal training)</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">overfit_pct</span><span class="o">=</span><span class="mf">0.0</span><span class="p">)</span>
+
+<span class="c1"># overfit on 1% of data </span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">overfit_pct</span><span class="o">=</span><span class="mf">0.01</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="print-the-parameter-count-by-layer">Print the parameter count by layer</h4>
+<p>By default lightning prints a list of parameters <em>and submodules</em> when it starts training.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT print a full list of all submodules and their parameters.</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">weights_summary</span><span class="o">=</span><span class="s1">&#39;full&#39;</span><span class="p">)</span>
+
+<span class="c1"># only print the top-level modules (i.e. the children of LightningModule).</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">weights_summary</span><span class="o">=</span><span class="s1">&#39;top&#39;</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="print-which-gradients-are-nan">Print which gradients are nan</h4>
+<p>This option prints a list of tensors with nan gradients.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># DEFAULT</span>
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">print_nan_grads</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="log-gpu-usage">Log GPU usage</h4>
+<p>Lightning automatically logs gpu usage to the test tube logs. It'll only do it at the metric logging interval, so it doesn't slow down training.</p>
+                
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+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/Trainer/index.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                <h1 id="trainer">Trainer</h1>
+<p>[<a href="https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/trainer/trainer.py">Github Code</a>]</p>
+<p>The lightning trainer abstracts best practices for running a training, val, test routine. It calls parts of your model when it wants to hand over full control and otherwise makes training assumptions which are now standard practice in AI research.</p>
+<p>This is the basic use of the trainer:</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">pytorch_lightning</span> <span class="kn">import</span> <span class="n">Trainer</span>
+
+<span class="n">model</span> <span class="o">=</span> <span class="n">LightningTemplate</span><span class="p">()</span>
+
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">()</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>But of course the fun is in all the advanced things it can do:</p>
+<p><strong>Checkpointing</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving">Checkpoint callback</a>    </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving">Model saving</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/methods/#load-from-metrics">Model loading</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#restoring-training-session">Restoring training session</a></li>
+</ul>
+<p><strong>Computing cluster (SLURM)</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#running-grid-search-on-a-cluster">Running grid search on a cluster</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#walltime-auto-resubmit">Walltime auto-resubmit</a>   </li>
+</ul>
+<p><strong>Debugging</strong>  </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#fast-dev-run">Fast dev run</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#inspect-gradient-norms">Inspect gradient norms</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#Log-gpu-usage">Log GPU usage</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#make-model-overfit-on-subset-of-data">Make model overfit on subset of data</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-the-parameter-count-by-layer">Print the parameter count by layer</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-which-gradients-are-nan">Print which gradients are nan</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/properties/#example_input_array">Print input and output size of every module in system</a></li>
+</ul>
+<p><strong>Distributed training</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#init_ddp_connection">Implement Your Own Distributed (DDP) training</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#16-bit-mixed-precision">16-bit mixed precision</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-GPU">Multi-GPU</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-node">Multi-node</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#single-gpu">Single GPU</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#self-balancing-architecture">Self-balancing architecture</a></li>
+</ul>
+<p><strong>Experiment Logging</strong>   </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#display-metrics-in-progress-bar">Display metrics in progress bar</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#log-metric-row-every-k-batches">Log metric row every k batches</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#process-position">Process position</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#tensorboard-support">Tensorboard support</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#save-a-snapshot-of-all-hyperparameters">Save a snapshot of all hyperparameters</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#snapshot-code-for-a-training-run">Snapshot code for a training run</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#write-logs-file-to-csv-every-k-batches">Write logs file to csv every k batches</a></li>
+</ul>
+<p><strong>Training loop</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#accumulated-gradients">Accumulate gradients</a>    </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-training-for-min-or-max-epochs">Force training for min or max epochs</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#early-stopping">Early stopping callback</a>    </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-disable-early-stop">Force disable early stop</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#gradient-clipping">Gradient Clipping</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/">Hooks</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers">Learning rate scheduling</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers">Use multiple optimizers (like GANs)</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#set-how-much-of-the-training-set-to-check">Set how much of the training set to check (1-100%)</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step">Step optimizers at arbitrary intervals</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#packed-sequences-as-inputs">Packed sequences</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning//Training%20Loop/#truncated-back-propation-through-time">Truncated Back Propagation Through Time</a></li>
+</ul>
+<p><strong>Validation loop</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#check-validation-every-n-epochs">Check validation every n epochs</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/">Hooks</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-validation-set-to-check">Set how much of the validation set to check</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-test-set-to-check">Set how much of the test set to check</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-validation-check-frequency-within-1-training-epoch">Set validation check frequency within 1 training epoch</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-the-number-of-validation-sanity-steps">Set the number of validation sanity steps</a></li>
+</ul>
+<p><strong>Testing loop</strong>    </p>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Testing%20loop/">Run test set</a>  </li>
+</ul>
+                
+                  
+                
+              
+              
+                
+
+
+              
+            </article>
+          </div>
+        </div>
+      </main>
+      
+        
+<footer class="md-footer">
+  
+    <div class="md-footer-nav">
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+      
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+</html>

appveyor.yml

@@ -1,64 +0,0 @@
-# https://www.appveyor.com/docs/appveyor-yml/
-environment:
-
-  # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
-  # /E:ON and /V:ON options are not enabled in the batch script interpreter
-  # See: http://stackoverflow.com/a/13751649/163740
-  CMD_IN_ENV: "cmd /E:ON /V:ON /C obvci_appveyor_python_build_env.cmd"
-
-  matrix:
-    # Pre-installed Python versions, which Appveyor may upgrade to
-    # a later point release.
-    # See: http://www.appveyor.com/docs/installed-software#python
-
-
-    # - PYTHON: "C:\\Python35-x64"
-    #   PYTHON_VERSION: "3.5.x"
-    #   PYTHON_ARCH: "64"
-    #  TOXENV: "py35"
-
-    - PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6.x"
-      PYTHON_ARCH: "64"
-      TOXENV: "py36"
-      PIP_PYVER: "36"
-
-    - PYTHON: "C:\\Python37-x64"
-      PYTHON_VERSION: "3.7.x"
-      PYTHON_ARCH: "64"
-      TOXENV: "py37"
-      PIP_PYVER: "37"
-
-build: off
-
-# https://www.appveyor.com/docs/build-cache/
-cache:
-  - C:\ProgramData\chocolatey\bin -> appveyor.yml
-  - C:\ProgramData\chocolatey\lib -> appveyor.yml
-  - '%LOCALAPPDATA%\pip\Cache -> appveyor.yml'
-
-# scripts that run after cloning repository
-install:
-  # If there is a newer build queued for the same PR, cancel this one.
-  # The AppVeyor 'rollout builds' option is supposed to serve the same
-  # purpose but it is problematic because it tends to cancel builds pushed
-  # directly to master instead of just PR builds (or the converse).
-  - SET PATH=%PYTHON%;%PYTHON%\\Scripts;%path%
-  - pip install -U --user pip
-  - pip install -r requirements.txt -f https://download.pytorch.org/whl/torch_stable.html
-  - pip install -r ./tests/requirements.txt
-
-# scripts to run before tests (working directory and environment changes are persisted from the previous steps such as "before_build")
-before_test:
-  - python --version
-  - pip --version
-  - pip list
-  - dir
-
-# to run your custom scripts instead of automatic tests
-test_script:
-  - tox --sitepackages --parallel auto
-
-on_success:
-  - coverage report
-  # - codecov

assets/fonts/material-icons.css

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+/*!
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy
+ * of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING, SOFTWARE
+ * DISTRIBUTED UNDER THE LICENSE IS DISTRIBUTED ON AN "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+ * SEE THE LICENSE FOR THE SPECIFIC LANGUAGE GOVERNING PERMISSIONS AND
+ * LIMITATIONS UNDER THE LICENSE.
+ */@font-face{font-family:"Material Icons";font-style:normal;font-weight:400;src:local("Material Icons"),local("MaterialIcons-Regular"),url("specimen/MaterialIcons-Regular.woff2") format("woff2"),url("specimen/MaterialIcons-Regular.woff") format("woff"),url("specimen/MaterialIcons-Regular.ttf") format("truetype")}

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assets/javascripts/lunr/lunr.da.js

@@ -0,0 +1 @@
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assets/javascripts/lunr/lunr.ja.js

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+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(m){if(void 0===m)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===m.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");var l="2"==m.version[0];m.ja=function(){this.pipeline.reset(),this.pipeline.add(m.ja.trimmer,m.ja.stopWordFilter,m.ja.stemmer),l?this.tokenizer=m.ja.tokenizer:(m.tokenizer&&(m.tokenizer=m.ja.tokenizer),this.tokenizerFn&&(this.tokenizerFn=m.ja.tokenizer))};var j=new m.TinySegmenter;m.ja.tokenizer=function(e){var r,t,i,n,o,s,p,a,u;if(!arguments.length||null==e||null==e)return[];if(Array.isArray(e))return e.map(function(e){return l?new m.Token(e.toLowerCase()):e.toLowerCase()});for(r=(t=e.toString().toLowerCase().replace(/^\s+/,"")).length-1;0<=r;r--)if(/\S/.test(t.charAt(r))){t=t.substring(0,r+1);break}for(o=[],i=t.length,p=a=0;a<=i;a++)if(s=a-p,t.charAt(a).match(/\s/)||a==i){if(0<s)for(n=j.segment(t.slice(p,a)).filter(function(e){return!!e}),u=p,r=0;r<n.length;r++)l?o.push(new m.Token(n[r],{position:[u,n[r].length],index:o.length})):o.push(n[r]),u+=n[r].length;p=a+1}return o},m.ja.stemmer=function(e){return e},m.Pipeline.registerFunction(m.ja.stemmer,"stemmer-ja"),m.ja.wordCharacters="一二三四五六七八九十百千万億兆一-龠々〆ヵヶぁ-んァ-ヴーｱ-ﾝﾞa-zA-Zａ-ｚＡ-Ｚ0-9０-９",m.ja.trimmer=m.trimmerSupport.generateTrimmer(m.ja.wordCharacters),m.Pipeline.registerFunction(m.ja.trimmer,"trimmer-ja"),m.ja.stopWordFilter=m.generateStopWordFilter("これ それ あれ この その あの ここ そこ あそこ こちら どこ だれ なに なん 何 私 貴方 貴方方 我々 私達 あの人 あのかた 彼女 彼 です あります おります います は が の に を で え から まで より も どの と し それで しかし".split(" ")),m.Pipeline.registerFunction(m.ja.stopWordFilter,"stopWordFilter-ja"),m.jp=m.ja,m.Pipeline.registerFunction(m.jp.stemmer,"stemmer-jp"),m.Pipeline.registerFunction(m.jp.trimmer,"trimmer-jp"),m.Pipeline.registerFunction(m.jp.stopWordFilter,"stopWordFilter-jp")}});

assets/javascripts/lunr/lunr.jp.js

@@ -0,0 +1 @@
+module.exports=require("./lunr.ja");

assets/javascripts/lunr/lunr.multi.js

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+!function(e,i){"function"==typeof define&&define.amd?define(i):"object"==typeof exports?module.exports=i():i()(e.lunr)}(this,function(){return function(o){o.multiLanguage=function(){for(var e=Array.prototype.slice.call(arguments),i=e.join("-"),t="",r=[],n=[],s=0;s<e.length;++s)"en"==e[s]?(t+="\\w",r.unshift(o.stopWordFilter),r.push(o.stemmer),n.push(o.stemmer)):(t+=o[e[s]].wordCharacters,r.unshift(o[e[s]].stopWordFilter),r.push(o[e[s]].stemmer),n.push(o[e[s]].stemmer));var p=o.trimmerSupport.generateTrimmer(t);return o.Pipeline.registerFunction(p,"lunr-multi-trimmer-"+i),r.unshift(p),function(){this.pipeline.reset(),this.pipeline.add.apply(this.pipeline,r),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add.apply(this.searchPipeline,n))}}}});

assets/javascripts/lunr/lunr.no.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");var r,n,i;e.no=function(){this.pipeline.reset(),this.pipeline.add(e.no.trimmer,e.no.stopWordFilter,e.no.stemmer),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add(e.no.stemmer))},e.no.wordCharacters="A-Za-zªºÀ-ÖØ-öø-ʸˠ-ˤᴀ-ᴥᴬ-ᵜᵢ-ᵥᵫ-ᵷᵹ-ᶾḀ-ỿⁱⁿₐ-ₜKÅℲⅎⅠ-ↈⱠ-ⱿꜢ-ꞇꞋ-ꞭꞰ-ꞷꟷ-ꟿꬰ-ꭚꭜ-ꭤff-stＡ-Ｚａ-ｚ",e.no.trimmer=e.trimmerSupport.generateTrimmer(e.no.wordCharacters),e.Pipeline.registerFunction(e.no.trimmer,"trimmer-no"),e.no.stemmer=(r=e.stemmerSupport.Among,n=e.stemmerSupport.SnowballProgram,i=new function(){var o,s,a=[new r("a",-1,1),new r("e",-1,1),new r("ede",1,1),new r("ande",1,1),new r("ende",1,1),new r("ane",1,1),new r("ene",1,1),new r("hetene",6,1),new r("erte",1,3),new r("en",-1,1),new r("heten",9,1),new r("ar",-1,1),new r("er",-1,1),new r("heter",12,1),new r("s",-1,2),new r("as",14,1),new r("es",14,1),new r("edes",16,1),new r("endes",16,1),new r("enes",16,1),new r("hetenes",19,1),new r("ens",14,1),new r("hetens",21,1),new r("ers",14,1),new r("ets",14,1),new r("et",-1,1),new r("het",25,1),new r("ert",-1,3),new r("ast",-1,1)],m=[new r("dt",-1,-1),new r("vt",-1,-1)],l=[new r("leg",-1,1),new r("eleg",0,1),new r("ig",-1,1),new r("eig",2,1),new r("lig",2,1),new r("elig",4,1),new r("els",-1,1),new r("lov",-1,1),new r("elov",7,1),new r("slov",7,1),new r("hetslov",9,1)],u=[17,65,16,1,0,0,0,0,0,0,0,0,0,0,0,0,48,0,128],d=[119,125,149,1],c=new n;this.setCurrent=function(e){c.setCurrent(e)},this.getCurrent=function(){return c.getCurrent()},this.stem=function(){var e,r,n,i,t=c.cursor;return function(){var e,r=c.cursor+3;if(s=c.limit,0<=r||r<=c.limit){for(o=r;;){if(e=c.cursor,c.in_grouping(u,97,248)){c.cursor=e;break}if(e>=c.limit)return;c.cursor=e+1}for(;!c.out_grouping(u,97,248);){if(c.cursor>=c.limit)return;c.cursor++}(s=c.cursor)<o&&(s=o)}}(),c.limit_backward=t,c.cursor=c.limit,function(){var e,r,n;if(c.cursor>=s&&(r=c.limit_backward,c.limit_backward=s,c.ket=c.cursor,e=c.find_among_b(a,29),c.limit_backward=r,e))switch(c.bra=c.cursor,e){case 1:c.slice_del();break;case 2:n=c.limit-c.cursor,c.in_grouping_b(d,98,122)?c.slice_del():(c.cursor=c.limit-n,c.eq_s_b(1,"k")&&c.out_grouping_b(u,97,248)&&c.slice_del());break;case 3:c.slice_from("er")}}(),c.cursor=c.limit,r=c.limit-c.cursor,c.cursor>=s&&(e=c.limit_backward,c.limit_backward=s,c.ket=c.cursor,c.find_among_b(m,2)?(c.bra=c.cursor,c.limit_backward=e,c.cursor=c.limit-r,c.cursor>c.limit_backward&&(c.cursor--,c.bra=c.cursor,c.slice_del())):c.limit_backward=e),c.cursor=c.limit,c.cursor>=s&&(i=c.limit_backward,c.limit_backward=s,c.ket=c.cursor,(n=c.find_among_b(l,11))?(c.bra=c.cursor,c.limit_backward=i,1==n&&c.slice_del()):c.limit_backward=i),!0}},function(e){return"function"==typeof e.update?e.update(function(e){return i.setCurrent(e),i.stem(),i.getCurrent()}):(i.setCurrent(e),i.stem(),i.getCurrent())}),e.Pipeline.registerFunction(e.no.stemmer,"stemmer-no"),e.no.stopWordFilter=e.generateStopWordFilter("alle at av bare begge ble blei bli blir blitt både båe da de deg dei deim deira deires dem den denne der dere deres det dette di din disse ditt du dykk dykkar då eg ein eit eitt eller elles en enn er et ett etter for fordi fra før ha hadde han hans har hennar henne hennes her hjå ho hoe honom hoss hossen hun hva hvem hver hvilke hvilken hvis hvor hvordan hvorfor i ikke ikkje ikkje ingen ingi inkje inn inni ja jeg kan kom korleis korso kun kunne kva kvar kvarhelst kven kvi kvifor man mange me med medan meg meget mellom men mi min mine mitt mot mykje ned no noe noen noka noko nokon nokor nokre nå når og også om opp oss over på samme seg selv si si sia sidan siden sin sine sitt sjøl skal skulle slik so som som somme somt så sånn til um upp ut uten var vart varte ved vere verte vi vil ville vore vors vort vår være være vært å".split(" ")),e.Pipeline.registerFunction(e.no.stopWordFilter,"stopWordFilter-no")}});

assets/javascripts/lunr/lunr.stemmer.support.js

@@ -0,0 +1 @@
+!function(r,t){"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():t()(r.lunr)}(this,function(){return function(r){r.stemmerSupport={Among:function(r,t,i,s){if(this.toCharArray=function(r){for(var t=r.length,i=new Array(t),s=0;s<t;s++)i[s]=r.charCodeAt(s);return i},!r&&""!=r||!t&&0!=t||!i)throw"Bad Among initialisation: s:"+r+", substring_i: "+t+", result: "+i;this.s_size=r.length,this.s=this.toCharArray(r),this.substring_i=t,this.result=i,this.method=s},SnowballProgram:function(){var b;return{bra:0,ket:0,limit:0,cursor:0,limit_backward:0,setCurrent:function(r){b=r,this.cursor=0,this.limit=r.length,this.limit_backward=0,this.bra=this.cursor,this.ket=this.limit},getCurrent:function(){var r=b;return b=null,r},in_grouping:function(r,t,i){if(this.cursor<this.limit){var s=b.charCodeAt(this.cursor);if(s<=i&&t<=s&&r[(s-=t)>>3]&1<<(7&s))return this.cursor++,!0}return!1},in_grouping_b:function(r,t,i){if(this.cursor>this.limit_backward){var s=b.charCodeAt(this.cursor-1);if(s<=i&&t<=s&&r[(s-=t)>>3]&1<<(7&s))return this.cursor--,!0}return!1},out_grouping:function(r,t,i){if(this.cursor<this.limit){var s=b.charCodeAt(this.cursor);if(i<s||s<t)return this.cursor++,!0;if(!(r[(s-=t)>>3]&1<<(7&s)))return this.cursor++,!0}return!1},out_grouping_b:function(r,t,i){if(this.cursor>this.limit_backward){var s=b.charCodeAt(this.cursor-1);if(i<s||s<t)return this.cursor--,!0;if(!(r[(s-=t)>>3]&1<<(7&s)))return this.cursor--,!0}return!1},eq_s:function(r,t){if(this.limit-this.cursor<r)return!1;for(var i=0;i<r;i++)if(b.charCodeAt(this.cursor+i)!=t.charCodeAt(i))return!1;return this.cursor+=r,!0},eq_s_b:function(r,t){if(this.cursor-this.limit_backward<r)return!1;for(var i=0;i<r;i++)if(b.charCodeAt(this.cursor-r+i)!=t.charCodeAt(i))return!1;return this.cursor-=r,!0},find_among:function(r,t){for(var i=0,s=t,e=this.cursor,n=this.limit,u=0,o=0,h=!1;;){for(var c=i+(s-i>>1),a=0,f=u<o?u:o,l=r[c],_=f;_<l.s_size;_++){if(e+f==n){a=-1;break}if(a=b.charCodeAt(e+f)-l.s[_])break;f++}if(a<0?(s=c,o=f):(i=c,u=f),s-i<=1){if(0<i||s==i||h)break;h=!0}}for(;;){if(u>=(l=r[i]).s_size){if(this.cursor=e+l.s_size,!l.method)return l.result;var m=l.method();if(this.cursor=e+l.s_size,m)return l.result}if((i=l.substring_i)<0)return 0}},find_among_b:function(r,t){for(var i=0,s=t,e=this.cursor,n=this.limit_backward,u=0,o=0,h=!1;;){for(var c=i+(s-i>>1),a=0,f=u<o?u:o,l=(_=r[c]).s_size-1-f;0<=l;l--){if(e-f==n){a=-1;break}if(a=b.charCodeAt(e-1-f)-_.s[l])break;f++}if(a<0?(s=c,o=f):(i=c,u=f),s-i<=1){if(0<i||s==i||h)break;h=!0}}for(;;){var _;if(u>=(_=r[i]).s_size){if(this.cursor=e-_.s_size,!_.method)return _.result;var m=_.method();if(this.cursor=e-_.s_size,m)return _.result}if((i=_.substring_i)<0)return 0}},replace_s:function(r,t,i){var s=i.length-(t-r);return b=b.substring(0,r)+i+b.substring(t),this.limit+=s,this.cursor>=t?this.cursor+=s:this.cursor>r&&(this.cursor=r),s},slice_check:function(){if(this.bra<0||this.bra>this.ket||this.ket>this.limit||this.limit>b.length)throw"faulty slice operation"},slice_from:function(r){this.slice_check(),this.replace_s(this.bra,this.ket,r)},slice_del:function(){this.slice_from("")},insert:function(r,t,i){var s=this.replace_s(r,t,i);r<=this.bra&&(this.bra+=s),r<=this.ket&&(this.ket+=s)},slice_to:function(){return this.slice_check(),b.substring(this.bra,this.ket)},eq_v_b:function(r){return this.eq_s_b(r.length,r)}}}},r.trimmerSupport={generateTrimmer:function(r){var t=new RegExp("^[^"+r+"]+"),i=new RegExp("[^"+r+"]+$");return function(r){return"function"==typeof r.update?r.update(function(r){return r.replace(t,"").replace(i,"")}):r.replace(t,"").replace(i,"")}}}}});

assets/javascripts/lunr/lunr.sv.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");var r,l,n;e.sv=function(){this.pipeline.reset(),this.pipeline.add(e.sv.trimmer,e.sv.stopWordFilter,e.sv.stemmer),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add(e.sv.stemmer))},e.sv.wordCharacters="A-Za-zªºÀ-ÖØ-öø-ʸˠ-ˤᴀ-ᴥᴬ-ᵜᵢ-ᵥᵫ-ᵷᵹ-ᶾḀ-ỿⁱⁿₐ-ₜKÅℲⅎⅠ-ↈⱠ-ⱿꜢ-ꞇꞋ-ꞭꞰ-ꞷꟷ-ꟿꬰ-ꭚꭜ-ꭤff-stＡ-Ｚａ-ｚ",e.sv.trimmer=e.trimmerSupport.generateTrimmer(e.sv.wordCharacters),e.Pipeline.registerFunction(e.sv.trimmer,"trimmer-sv"),e.sv.stemmer=(r=e.stemmerSupport.Among,l=e.stemmerSupport.SnowballProgram,n=new function(){var n,t,i=[new r("a",-1,1),new r("arna",0,1),new r("erna",0,1),new r("heterna",2,1),new r("orna",0,1),new r("ad",-1,1),new r("e",-1,1),new r("ade",6,1),new r("ande",6,1),new r("arne",6,1),new r("are",6,1),new r("aste",6,1),new r("en",-1,1),new r("anden",12,1),new r("aren",12,1),new r("heten",12,1),new r("ern",-1,1),new r("ar",-1,1),new r("er",-1,1),new r("heter",18,1),new r("or",-1,1),new r("s",-1,2),new r("as",21,1),new r("arnas",22,1),new r("ernas",22,1),new r("ornas",22,1),new r("es",21,1),new r("ades",26,1),new r("andes",26,1),new r("ens",21,1),new r("arens",29,1),new r("hetens",29,1),new r("erns",21,1),new r("at",-1,1),new r("andet",-1,1),new r("het",-1,1),new r("ast",-1,1)],s=[new r("dd",-1,-1),new r("gd",-1,-1),new r("nn",-1,-1),new r("dt",-1,-1),new r("gt",-1,-1),new r("kt",-1,-1),new r("tt",-1,-1)],a=[new r("ig",-1,1),new r("lig",0,1),new r("els",-1,1),new r("fullt",-1,3),new r("löst",-1,2)],o=[17,65,16,1,0,0,0,0,0,0,0,0,0,0,0,0,24,0,32],u=[119,127,149],m=new l;this.setCurrent=function(e){m.setCurrent(e)},this.getCurrent=function(){return m.getCurrent()},this.stem=function(){var e,r=m.cursor;return function(){var e,r=m.cursor+3;if(t=m.limit,0<=r||r<=m.limit){for(n=r;;){if(e=m.cursor,m.in_grouping(o,97,246)){m.cursor=e;break}if(m.cursor=e,m.cursor>=m.limit)return;m.cursor++}for(;!m.out_grouping(o,97,246);){if(m.cursor>=m.limit)return;m.cursor++}(t=m.cursor)<n&&(t=n)}}(),m.limit_backward=r,m.cursor=m.limit,function(){var e,r=m.limit_backward;if(m.cursor>=t&&(m.limit_backward=t,m.cursor=m.limit,m.ket=m.cursor,e=m.find_among_b(i,37),m.limit_backward=r,e))switch(m.bra=m.cursor,e){case 1:m.slice_del();break;case 2:m.in_grouping_b(u,98,121)&&m.slice_del()}}(),m.cursor=m.limit,e=m.limit_backward,m.cursor>=t&&(m.limit_backward=t,m.cursor=m.limit,m.find_among_b(s,7)&&(m.cursor=m.limit,m.ket=m.cursor,m.cursor>m.limit_backward&&(m.bra=--m.cursor,m.slice_del())),m.limit_backward=e),m.cursor=m.limit,function(){var e,r;if(m.cursor>=t){if(r=m.limit_backward,m.limit_backward=t,m.cursor=m.limit,m.ket=m.cursor,e=m.find_among_b(a,5))switch(m.bra=m.cursor,e){case 1:m.slice_del();break;case 2:m.slice_from("lös");break;case 3:m.slice_from("full")}m.limit_backward=r}}(),!0}},function(e){return"function"==typeof e.update?e.update(function(e){return n.setCurrent(e),n.stem(),n.getCurrent()}):(n.setCurrent(e),n.stem(),n.getCurrent())}),e.Pipeline.registerFunction(e.sv.stemmer,"stemmer-sv"),e.sv.stopWordFilter=e.generateStopWordFilter("alla allt att av blev bli blir blivit de dem den denna deras dess dessa det detta dig din dina ditt du där då efter ej eller en er era ert ett från för ha hade han hans har henne hennes hon honom hur här i icke ingen inom inte jag ju kan kunde man med mellan men mig min mina mitt mot mycket ni nu när någon något några och om oss på samma sedan sig sin sina sitta själv skulle som så sådan sådana sådant till under upp ut utan vad var vara varför varit varje vars vart vem vi vid vilka vilkas vilken vilket vår våra vårt än är åt över".split(" ")),e.Pipeline.registerFunction(e.sv.stopWordFilter,"stopWordFilter-sv")}});

assets/javascripts/lunr/lunr.th.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(t){if(void 0===t)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===t.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");var i="2"==t.version[0];t.th=function(){this.pipeline.reset(),this.pipeline.add(t.th.trimmer),i?this.tokenizer=t.th.tokenizer:(t.tokenizer&&(t.tokenizer=t.th.tokenizer),this.tokenizerFn&&(this.tokenizerFn=t.th.tokenizer))},t.th.wordCharacters="[฀-๿]",t.th.trimmer=t.trimmerSupport.generateTrimmer(t.th.wordCharacters),t.Pipeline.registerFunction(t.th.trimmer,"trimmer-th");var n=t.wordcut;n.init(),t.th.tokenizer=function(e){if(!arguments.length||null==e||null==e)return[];if(Array.isArray(e))return e.map(function(e){return i?new t.Token(e):e});var r=e.toString().replace(/^\s+/,"");return n.cut(r).split("|")}}});

docs/LightningModule/RequiredTrainerInterface.md

@@ -1,640 +0,0 @@
-# Lightning Module interface
-[[Github Code](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/root_module/root_module.py)]
-
-A lightning module is a strict superclass of nn.Module, it provides a standard interface for the trainer to interact with the model.
-
-The easiest thing to do is copy the [minimal example](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#minimal-example) below and modify accordingly. 
-
-Otherwise, to Define a Lightning Module, implement the following methods:
-
-**Required**:  
-
-- [training_step](RequiredTrainerInterface.md#training_step)      
-- [tng_dataloader](RequiredTrainerInterface.md#tng_dataloader)    
-- [configure_optimizers](RequiredTrainerInterface.md#configure_optimizers)    
-
-**Optional**:   
-
-- [validation_step](RequiredTrainerInterface.md#validation_step)    
-- [validation_end](RequiredTrainerInterface.md#validation_end) 
-- [test_step](RequiredTrainerInterface.md#test_step)    
-- [test_end](RequiredTrainerInterface.md#test_end) 
-- [val_dataloader](RequiredTrainerInterface.md#val_dataloader)    
-- [test_dataloader](RequiredTrainerInterface.md#test_dataloader)    
-- [on_save_checkpoint](RequiredTrainerInterface.md#on_save_checkpoint)    
-- [on_load_checkpoint](RequiredTrainerInterface.md#on_load_checkpoint)    
-- [update_tng_log_metrics](RequiredTrainerInterface.md#update_tng_log_metrics)    
-- [add_model_specific_args](RequiredTrainerInterface.md#add_model_specific_args)    
-
----
-### Minimal example   
-```python
-import os
-import torch
-from torch.nn import functional as F
-from torch.utils.data import DataLoader
-from torchvision.datasets import MNIST
-import torchvision.transforms as transforms
-
-import pytorch_lightning as pl
-
-class CoolModel(pl.LightningModule):
-
-    def __init__(self):
-        super(CoolModel, self).__init__()
-        # not the best model...
-        self.l1 = torch.nn.Linear(28 * 28, 10)
-
-    def forward(self, x):
-        return torch.relu(self.l1(x.view(x.size(0), -1)))
-
-    def training_step(self, batch, batch_nb):
-        # REQUIRED
-        x, y = batch
-        y_hat = self.forward(x)
-        return {'loss': F.cross_entropy(y_hat, y)}
-
-    def validation_step(self, batch, batch_nb):
-        # OPTIONAL
-        x, y = batch
-        y_hat = self.forward(x)
-        return {'val_loss': F.cross_entropy(y_hat, y)}
-
-    def validation_end(self, outputs):
-        # OPTIONAL
-        avg_loss = torch.stack([x['val_loss'] for x in outputs]).mean()
-        return {'avg_val_loss': avg_loss}
-
-    def test_step(self, batch, batch_nb):
-        # OPTIONAL
-        x, y = batch
-        y_hat = self.forward(x)
-        return {'test_loss': F.cross_entropy(y_hat, y)}
-
-    def test_end(self, outputs):
-        # OPTIONAL
-        avg_loss = torch.stack([x['test_loss'] for x in outputs]).mean()
-        return {'avg_test_loss': avg_loss}
-
-    def configure_optimizers(self):
-        # REQUIRED
-        return [torch.optim.Adam(self.parameters(), lr=0.02)]
-
-    @pl.data_loader
-    def tng_dataloader(self):
-        return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=32)
-
-    @pl.data_loader
-    def val_dataloader(self):
-        # OPTIONAL
-        # can also return a list of val dataloaders
-        return DataLoader(MNIST(os.getcwd(), train=True, download=True, transform=transforms.ToTensor()), batch_size=32)
-
-    @pl.data_loader
-    def test_dataloader(self):
-        # OPTIONAL
-        # can also return a list of test dataloaders
-        return DataLoader(MNIST(os.getcwd(), train=False, download=True, transform=transforms.ToTensor()), batch_size=32)
-```
----   
-### How do these methods fit into the broader training?     
-The LightningModule interface is on the right. Each method corresponds to a part of a research project. Lightning automates everything not in blue.    
-
-<p align="center">
-  <a href="https://github.com/williamFalcon/pytorch-lightning/blob/master/docs/source/_static/overview_flat.jpg">
-    <img alt="" src="https://github.com/williamFalcon/pytorch-lightning/blob/master/docs/source/_static/overview_flat.jpg" height="900px">
-  </a>
-</p>   
-
-## Required Methods    
-
-### training_step
-
-``` {.python}
-def training_step(self, data_batch, batch_nb)
-```
-
-In this step you'd normally do the forward pass and calculate the loss for a batch. You can also do fancier things like multiple forward passes or something specific to your model.
-
-**Params**    
-
-| Param  | description  |
-|---|---|
-|  data_batch | The output of your dataloader. A tensor, tuple or list  |
-|  batch_nb | Integer displaying which batch this is  |
-
-**Return**   
-
-Dictionary or OrderedDict   
-
-| key  | value  | is required |
-|---|---|---|
-|  loss | tensor scalar  | Y |
-|  prog | Dict for progress bar display. Must have only tensors  | N |
-
-
-**Example**
-
-``` {.python}
-def training_step(self, data_batch, batch_nb):
-    x, y, z = data_batch
-    
-    # implement your own
-    out = self.forward(x)
-    loss = self.loss(out, x)
-    
-    output = {
-        'loss': loss, # required
-        'prog': {'tng_loss': loss, 'batch_nb': batch_nb} # optional
-    }
-    
-    # return a dict
-    return output
-```    
-
-If you define multiple optimizers, this step will also be called with an additional ```optimizer_idx``` param.    
-``` {.python}
-# Multiple optimizers (ie: GANs)     
-def training_step(self, data_batch, batch_nb, optimizer_idx):
-    if optimizer_idx == 0:
-        # do training_step with encoder
-    if optimizer_idx == 1:
-        # do training_step with decoder    
-```    
-
---- 
-### tng_dataloader 
-
-``` {.python}
-@pl.data_loader
-def tng_dataloader(self)
-```
-Called by lightning during training loop. Make sure to use the @pl.data_loader decorator, this ensures not calling this function until the data are needed.
-
-##### Return
-PyTorch DataLoader
-
-**Example**
-
-``` {.python}
-@pl.data_loader
-def tng_dataloader(self):
-    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.5,), (1.0,))])
-    dataset = MNIST(root='/path/to/mnist/', train=True, transform=transform, download=True)
-    loader = torch.utils.data.DataLoader(
-        dataset=dataset,
-        batch_size=self.hparams.batch_size,
-        shuffle=True
-    )
-    return loader
-```
-
---- 
-### configure_optimizers 
-
-``` {.python}
-def configure_optimizers(self)
-```
-
-Set up as many optimizers and (optionally) learning rate schedulers as you need. Normally you'd need one. But in the case of GANs or something more esoteric you might have multiple. 
-Lightning will call .backward() and .step() on each one in every epoch.  If you use 16 bit precision it will also handle that.
-
-**Note:** If you use multiple optimizers, training_step will have an additional ```optimizer_idx``` parameter.    
-
-
-
-##### Return    
-Return any of these 3 options:   
-Single optimizer   
-List or Tuple - List of optimizers    
-Two lists - The first list has multiple optimizers, the second a list of learning-rate schedulers
-
-**Example**
-
-``` {.python}
-# most cases
-def configure_optimizers(self):
-    opt = Adam(self.parameters(), lr=0.01)
-    return opt
-
-# multiple optimizer case (eg: GAN)
-def configure_optimizers(self):
-    generator_opt = Adam(self.model_gen.parameters(), lr=0.01)
-    disriminator_opt = Adam(self.model_disc.parameters(), lr=0.02)
-    return generator_opt, disriminator_opt
-    
-# example with learning_rate schedulers  
-def configure_optimizers(self):
-    generator_opt = Adam(self.model_gen.parameters(), lr=0.01)
-    disriminator_opt = Adam(self.model_disc.parameters(), lr=0.02)
-    discriminator_sched = CosineAnnealing(discriminator_opt, T_max=10)
-    return [generator_opt, disriminator_opt], [discriminator_sched]
-```  
-
-If you need to control how often those optimizers step or override the default .step() schedule, override 
-the [optimizer_step](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step) hook.   
-
-## Optional Methods    
-
-### validation_step
-
-``` {.python}
-# if you have one val dataloader:
-def validation_step(self, data_batch, batch_nb)   
-
-# if you have multiple val dataloaders:  
-def validation_step(self, data_batch, batch_nb, dataloader_idx)
-```
-**OPTIONAL**    
-If you don't need to validate you don't need to implement this method.    
-
-In this step you'd normally generate examples or calculate anything of interest such as accuracy. 
-
-The dict you return here will be available in the `validation_end` method. 
-
-**Params**   
-
-| Param  | description  |
-|---|---|
-|  data_batch | The output of your dataloader. A tensor, tuple or list  |
-|  batch_nb | Integer displaying which batch this is  |
-|  dataloader_i | Integer displaying which dataloader this is (only if multiple val datasets used)  |
-
-**Return**   
-
-| Return  | description  | optional |
-|---|---|---|   
-|  dict | Dict or OrderedDict with metrics to display in progress bar. All keys must be tensors. | Y |
-
-**Example**
-
-``` {.python}
-# CASE 1: A single validation dataset
-def validation_step(self, data_batch, batch_nb):
-    x, y = data_batch
-    
-    # implement your own
-    out = self.forward(x)
-    loss = self.loss(out, y)
-    
-    # log 6 example images
-    # or generated text... or whatever
-    sample_imgs = x[:6]
-    grid = torchvision.utils.make_grid(sample_imgs)
-    self.experiment.add_image('example_images', grid, 0) 
-    
-    # calculate acc
-    labels_hat = torch.argmax(out, dim=1)
-    val_acc = torch.sum(y == labels_hat).item() / (len(y) * 1.0)
-    
-    # all optional...
-    # return whatever you need for the collation function validation_end
-    output = OrderedDict({
-        'val_loss': loss_val,
-        'val_acc': torch.tensor(val_acc), # everything must be a tensor
-    })
-    
-    # return an optional dict
-    return output
-```   
-
-If you pass in multiple validation datasets, validation_step will have an additional argument.
-
-```python
-# CASE 2: multiple validation datasets
-def validation_step(self, data_batch, batch_nb, dataset_idx):
-    # dataset_idx tells you which dataset this is.   
-```   
-
-The ```dataset_idx``` corresponds to the order of datasets returned in ```val_dataloader```.    
-
---- 
-### validation_end
-
-``` {.python}
-def validation_end(self, outputs)
-```   
-If you didn't define a validation_step, this won't be called.       
-
-Called at the end of the validation loop with the output of each validation_step.  Called once per validation dataset.   
-
-The outputs here are strictly for the progress bar. If you don't need to display anything, don't return anything.    
-
-**Params**    
-
-| Param  | description  |
-|---|---|
-|  outputs | List of outputs you defined in validation_step |
-
-**Return**   
-
-| Return  | description  | optional |
-|---|---|---|   
-|  dict | Dict of OrderedDict with metrics to display in progress bar | Y |
-
-**Example**
-
-``` {.python}
-def validation_end(self, outputs):
-    """
-    Called at the end of validation to aggregate outputs
-    :param outputs: list of individual outputs of each validation step
-    :return:
-    """
-    val_loss_mean = 0
-    val_acc_mean = 0
-    for output in outputs:
-        val_loss_mean += output['val_loss']
-        val_acc_mean += output['val_acc']
-
-    val_loss_mean /= len(outputs)
-    val_acc_mean /= len(outputs)
-    tqdm_dic = {'val_loss': val_loss_mean.item(), 'val_acc': val_acc_mean.item()}
-    return tqdm_dic
-```
-
-### test_step
-
-``` {.python}
-# if you have one test dataloader:
-def test_step(self, data_batch, batch_nb)   
-
-# if you have multiple test dataloaders:  
-def test_step(self, data_batch, batch_nb, dataloader_idx)
-```
-**OPTIONAL**    
-If you don't need to test you don't need to implement this method.    
-
-In this step you'd normally generate examples or calculate anything of interest such as accuracy. 
-
-The dict you return here will be available in the `test_end` method. 
-
-This function is used when you execute `trainer.test()`.
-
-**Params**   
-
-| Param  | description  |
-|---|---|
-|  data_batch | The output of your dataloader. A tensor, tuple or list  |
-|  batch_nb | Integer displaying which batch this is  |
-|  dataloader_i | Integer displaying which dataloader this is (only if multiple test datasets used)  |
-
-**Return**   
-
-| Return  | description  | optional |
-|---|---|---|   
-|  dict | Dict or OrderedDict with metrics to display in progress bar. All keys must be tensors. | Y |
-
-**Example**
-
-``` {.python}
-# CASE 1: A single test dataset
-def test_step(self, data_batch, batch_nb):
-    x, y = data_batch
-    
-    # implement your own
-    out = self.forward(x)
-    loss = self.loss(out, y)
-    
-    # calculate acc
-    labels_hat = torch.argmax(out, dim=1)
-    test_acc = torch.sum(y == labels_hat).item() / (len(y) * 1.0)
-    
-    # all optional...
-    # return whatever you need for the collation function test_end
-    output = OrderedDict({
-        'test_loss': loss_test,
-        'test_acc': torch.tensor(test_acc), # everything must be a tensor
-    })
-    
-    # return an optional dict
-    return output
-```   
-
-If you pass in multiple test datasets, test_step will have an additional argument.
-
-```python
-# CASE 2: multiple test datasets
-def test_step(self, data_batch, batch_nb, dataset_idx):
-    # dataset_idx tells you which dataset this is.   
-```   
-
-The ```dataset_idx``` corresponds to the order of datasets returned in ```test_dataloader```.    
-
---- 
-### test_end
-
-``` {.python}
-def test_end(self, outputs)
-```   
-If you didn't define a test_step, this won't be called.       
-
-Called at the end of the test step with the output of each test_step.  Called once per test dataset.   
-
-The outputs here are strictly for the progress bar. If you don't need to display anything, don't return anything.    
-
-**Params**    
-
-| Param  | description  |
-|---|---|
-|  outputs | List of outputs you defined test_step |
-
-**Return**   
-
-| Return  | description  | optional |
-|---|---|---|   
-|  dict | Dict of OrderedDict with metrics to display in progress bar | Y |
-
-**Example**
-
-``` {.python}
-def test_end(self, outputs):
-    """
-    Called at the end of test to aggregate outputs
-    :param outputs: list of individual outputs of each test step
-    :return:
-    """
-    test_loss_mean = 0
-    test_acc_mean = 0
-    for output in outputs:
-        test_loss_mean += output['test_loss']
-        test_acc_mean += output['test_acc']
-
-    test_loss_mean /= len(outputs)
-    test_acc_mean /= len(outputs)
-    tqdm_dic = {'test_loss': test_loss_mean.item(), 'test_acc': test_acc_mean.item()}
-    return tqdm_dic
-```
-
---- 
-### on_save_checkpoint 
-
-``` {.python}
-def on_save_checkpoint(self, checkpoint)
-```
-Called by lightning to checkpoint your model. Lightning saves the training state (current epoch, global_step, etc)
-and also saves the model state_dict. If you want to save anything else, use this method to add your own
-key-value pair.
-
-##### Return
-Nothing
-
-**Example**
-
-``` {.python}
-def on_save_checkpoint(self, checkpoint):
-    # 99% of use cases you don't need to implement this method 
-    checkpoint['something_cool_i_want_to_save'] = my_cool_pickable_object
-```
-
---- 
-### on_load_checkpoint 
-
-``` {.python}
-def on_load_checkpoint(self, checkpoint)
-```
-Called by lightning to restore your model. Lighting auto-restores global step, epoch, etc...
-It also restores the model state_dict.
-If you saved something with **on_save_checkpoint** this is your chance to restore this.
-
-##### Return
-Nothing  
-
-**Example**
-
-``` {.python}
-def on_load_checkpoint(self, checkpoint):
-    # 99% of the time you don't need to implement this method
-    self.something_cool_i_want_to_save = checkpoint['something_cool_i_want_to_save']
-```
-
---- 
-### val_dataloader 
-
-``` {.python}
-@pl.data_loader
-def val_dataloader(self)
-```
-**OPTIONAL**    
-If you don't need a validation dataset and a validation_step, you don't need to implement this method.    
-
-Called by lightning during validation loop. Make sure to use the @pl.data_loader decorator, this ensures not calling this function until the data are needed.   
-
-##### Return
-PyTorch DataLoader or list of PyTorch Dataloaders.    
-
-**Example**
-
-``` {.python}
-@pl.data_loader
-def val_dataloader(self):
-    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.5,), (1.0,))])
-    dataset = MNIST(root='/path/to/mnist/', train=False, transform=transform, download=True)
-    loader = torch.utils.data.DataLoader(
-        dataset=dataset,
-        batch_size=self.hparams.batch_size,
-        shuffle=True
-    )
-    
-    return loader
-
-# can also return multiple dataloaders   
-@pl.data_loader
-def val_dataloader(self):
-    return [loader_a, loader_b, ..., loader_n]   
-```
-
-In the case where you return multiple val_dataloaders, the validation_step will have an arguement ```dataset_idx```
-which matches the order here.    
-
---- 
-### test_dataloader 
-
-``` {.python}
-@pl.data_loader
-def test_dataloader(self)
-```
-**OPTIONAL**    
-If you don't need a test dataset and a test_step, you don't need to implement this method.    
-
-Called by lightning during test loop. Make sure to use the @pl.data_loader decorator, this ensures not calling this function until the data are needed.
-
-##### Return
-PyTorch DataLoader
-
-**Example**
-
-``` {.python}
-@pl.data_loader
-def test_dataloader(self):
-    transform = transforms.Compose([transforms.ToTensor(), transforms.Normalize((0.5,), (1.0,))])
-    dataset = MNIST(root='/path/to/mnist/', train=False, transform=transform, download=True)
-    loader = torch.utils.data.DataLoader(
-        dataset=dataset,
-        batch_size=self.hparams.batch_size,
-        shuffle=True
-    )
-    
-    return loader
-```
-
---- 
-### update_tng_log_metrics 
-
-``` {.python}
-def update_tng_log_metrics(self, logs)
-```
-Called by lightning right before it logs metrics for this batch.
-This is a chance to amend or add to the metrics about to be logged.
-
-##### Return
-Dict 
-
-**Example**
-
-``` {.python}
-def update_tng_log_metrics(self, logs):
-    # modify or add to logs
-    return logs
-```
-
---- 
-### add_model_specific_args 
-
-``` {.python}
-@staticmethod
-def add_model_specific_args(parent_parser, root_dir)
-```
-Lightning has a list of default argparse commands.
-This method is your chance to add or modify commands specific to your model.
-The [hyperparameter argument parser](https://williamfalcon.github.io/test-tube/hyperparameter_optimization/HyperOptArgumentParser/) is available anywhere in your model by calling self.hparams.
-
-##### Return
-An argument parser
-
-**Example**
-
-``` {.python}
-@staticmethod
-def add_model_specific_args(parent_parser, root_dir):
-    parser = HyperOptArgumentParser(strategy=parent_parser.strategy, parents=[parent_parser])
-
-    # param overwrites
-    # parser.set_defaults(gradient_clip=5.0)
-
-    # network params
-    parser.opt_list('--drop_prob', default=0.2, options=[0.2, 0.5], type=float, tunable=False)
-    parser.add_argument('--in_features', default=28*28)
-    parser.add_argument('--out_features', default=10)
-    parser.add_argument('--hidden_dim', default=50000) # use 500 for CPU, 50000 for GPU to see speed difference
-
-    # data
-    parser.add_argument('--data_root', default=os.path.join(root_dir, 'mnist'), type=str)
-
-    # training params (opt)
-    parser.opt_list('--learning_rate', default=0.001, type=float, options=[0.0001, 0.0005, 0.001, 0.005],
-                    tunable=False)
-    parser.opt_list('--batch_size', default=256, type=int, options=[32, 64, 128, 256], tunable=False)
-    parser.opt_list('--optimizer_name', default='adam', type=str, options=['adam'], tunable=False)
-    return parser
-```

docs/LightningModule/methods.md

@@ -1,50 +0,0 @@
-Lightning modules are strict superclasses of torch.nn.Module. A LightningModule offers the following in addition to that API.
-
----    
-### freeze 
-Freeze all params for inference
-```{.python}
-model = MyLightningModule(...)
-model.freeze()
-```
-
----    
-### load_from_metrics
-This is the easiest/fastest way which uses the meta_tags.csv file from test-tube to rebuild the model.
-The meta_tags.csv file can be found in the test-tube experiment save_dir.       
-
-```{.python}
-pretrained_model = MyLightningModule.load_from_metrics(
-    weights_path='/path/to/pytorch_checkpoint.ckpt',
-    tags_csv='/path/to/test_tube/experiment/version/meta_tags.csv',
-    on_gpu=True,
-    map_location=None
-)
-    
-# predict
-pretrained_model.eval()
-pretrained_model.freeze()
-y_hat = pretrained_model(x)
-```
-
-**Params**    
-
-| Param  | description  |
-|---|---|
-|  weights_path | Path to a PyTorch checkpoint  |
-|  tags_csv | Path to meta_tags.csv file generated by the test-tube Experiment  |
-|  on_gpu | if True, puts model on GPU. Make sure to use transforms option if model devices have changed  |
-|  map_location | A dictionary mapping saved weight GPU devices to new GPU devices |
-
-**Returns**    
-
-LightningModule - The pretrained LightningModule
-
----    
-### unfreeze 
-Unfreeze all params for inference
-```{.python}
-model = MyLightningModule(...)
-model.unfreeze()
-```
-

docs/LightningModule/properties.md

@@ -1,54 +0,0 @@
-A LightningModule has the following properties which you can access at any time
-
---- 
-#### current_epoch
-The current epoch   
-
----
-#### dtype    
-Current dtype    
-
----
-#### experiment    
-An instance of test-tube Experiment which you can use to log anything for tensorboard (subclass of [PyTorch SummaryWriter](https://pytorch.org/docs/stable/tensorboard.html)).   
-```{.python}
-self.experiment.add_embedding(...)   
-self.experiment.log({'val_loss': 0.9})   
-self.experiment.add_scalars(...)   
-```
-
---- 
-#### global_step   
-Total training batches seen across all epochs   
-
---- 
-#### gradient_clip   
-The current gradient clip value    
-
----
-#### on_gpu    
-True if your model is currently running on GPUs. Useful to set flags around the LightningModule for different CPU vs GPU behavior.    
-
----
-#### trainer    
-Last resort access to any state the trainer has. Changing certain properties here could affect your training run.
-```{.python}   
-self.trainer.optimizers
-self.trainer.current_epoch
-...   
-```   
-
-## Debugging   
-The LightningModule also offers these tricks to help debug.   
-
----   
-#### example_input_array    
-In the LightningModule init, you can set a dummy tensor for this property
-to get a print out of sizes coming into and out of every layer.   
-```python
-def __init__(self):
-    # put the dimensions of the first input to your system
-    self.example_input_array = torch.rand(5, 28 * 28)
-```    
-
-

docs/Trainer/Checkpointing.md

@@ -1,69 +0,0 @@
-Lightning can automate saving and loading checkpoints.
-
----
-### Model saving
-To enable checkpointing, define the checkpoint callback and give it to the trainer.
-
-``` {.python}
-from pytorch_lightning.callbacks import ModelCheckpoint
-
-checkpoint_callback = ModelCheckpoint(
-    filepath='/path/to/store/weights.ckpt',
-    save_best_only=True,
-    verbose=True,
-    monitor='val_loss',
-    mode='min'
-)
-
-trainer = Trainer(checkpoint_callback=checkpoint_callback)
-```
-
----
-### Restoring training session 
-You might want to not only load a model but also continue training it. Use this method to
-restore the trainer state as well. This will continue from the epoch and global step you last left off.  
-However, the dataloaders will start from the first batch again (if you shuffled it shouldn't matter).   
-
-Lightning will restore the session if you pass an experiment with the same version and there's a saved checkpoint.   
-``` {.python}
-from test_tube import Experiment
-
-exp = Experiment(version=a_previous_version_with_a_saved_checkpoint)
-trainer = Trainer(experiment=exp)
-
-# this fit call loads model weights and trainer state
-# the trainer continues seamlessly from where you left off
-# without having to do anything else.
-trainer.fit(model)
-```
-
-The trainer restores:  
-
-- global_step    
-- current_epoch    
-- All optimizers    
-- All lr_schedulers    
-- Model weights
-
-You can even change the logic of your model as long as the weights and "architecture" of 
-the system isn't different. If you add a layer, for instance, it might not work.   
-
-At a rough level, here's [what happens inside Trainer](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/root_module/model_saving.py#L63):   
-```python
-
-self.global_step = checkpoint['global_step']
-self.current_epoch = checkpoint['epoch']
-
-# restore the optimizers
-optimizer_states = checkpoint['optimizer_states']
-for optimizer, opt_state in zip(self.optimizers, optimizer_states):
-    optimizer.load_state_dict(opt_state)
-
-# restore the lr schedulers
-lr_schedulers = checkpoint['lr_schedulers']
-for scheduler, lrs_state in zip(self.lr_schedulers, lr_schedulers):
-    scheduler.load_state_dict(lrs_state)
-
-# uses the model you passed into trainer        
-model.load_state_dict(checkpoint['state_dict'])
-```    

docs/Trainer/Distributed training.md

@@ -1,143 +0,0 @@
-Lightning makes multi-gpu training and 16 bit training trivial.
-
-*Note:*   
-None of the flags below require changing anything about your lightningModel definition. 
-
----
-#### Choosing a backend  
-Lightning supports two backends. DataParallel and DistributedDataParallel. Both can be used for single-node multi-GPU training.
-For multi-node training you must use DistributedDataParallel.   
-
-You can toggle between each mode by setting this flag.
-``` {.python}
-# DEFAULT uses DataParallel
-trainer = Trainer(distributed_backend='dp')
-
-# change to distributed data parallel
-trainer = Trainer(distributed_backend='ddp')
-```
-
-If you request multiple nodes, the back-end will auto-switch to ddp.
-We recommend you use DistributedDataparallel even for single-node multi-GPU training. It is MUCH faster than DP but *may*
-have configuration issues depending on your cluster.
-
-For a deeper understanding of what lightning is doing, feel free to read [this guide](https://medium.com/@_willfalcon/9-tips-for-training-lightning-fast-neural-networks-in-pytorch-8e63a502f565).   
-
----
-#### Distributed and 16-bit precision.    
-Due to an issue with apex and DistributedDataParallel (PyTorch and NVIDIA issue), Lightning does
-not allow 16-bit and DP training. We tried to get this to work, but it's an issue on their end.   
-
-Below are the possible configurations we support.    
-
-| 1 GPU  | 1+ GPUs  | DP  | DDP  | 16-bit  | command |
-|---|---|---|---|---|---|
-| Y  |   |   |   |  | ```Trainer(gpus=[0])``` |
-| Y  |   |   |   | Y | ```Trainer(gpus=[0], use_amp=True)``` |
-|   | Y | Y |   |   | ```Trainer(gpus=[0, ...])``` |
-|   | Y |  | Y  |  | ```Trainer(gpus=[0, ...], distributed_backend='ddp')``` |
-|   | Y |  | Y  | Y | ```Trainer(gpus=[0, ...], distributed_backend='ddp', use_amp=True)``` |
-
-
----
-#### CUDA flags   
-CUDA flags make certain GPUs visible to your script. 
-Lightning sets these for you automatically, there's NO NEED to do this yourself.
-```python
-# lightning will set according to what you give the trainer
-# os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
-# os.environ["CUDA_VISIBLE_DEVICES"] = "0"
-```
-
----
-#### 16-bit mixed precision
-16 bit precision can cut your memory footprint by half. If using volta architecture GPUs it can give a dramatic training speed-up as well.    
-First, install apex (if install fails, look [here](https://github.com/NVIDIA/apex)):
-```bash
-$ git clone https://github.com/NVIDIA/apex
-$ cd apex
-$ pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" ./
-```
-
-then set this use_amp to True.
-``` {.python}
-# DEFAULT
-trainer = Trainer(amp_level='O2', use_amp=False)
-```
-
----
-#### Single-gpu
-Make sure you're on a GPU machine. 
-```python
-# DEFAULT
-trainer = Trainer(gpus=[0])
-```
-
----
-#### multi-gpu 
-Make sure you're on a GPU machine. You can set as many GPUs as you want.
-In this setting, the model will run on all 8 GPUs at once using DataParallel under the hood.
-```python
-# to use DataParallel (default)
-trainer = Trainer(gpus=[0,1,2,3,4,5,6,7], distributed_backend='dp')
-
-# RECOMMENDED use DistributedDataParallel
-trainer = Trainer(gpus=[0,1,2,3,4,5,6,7], distributed_backend='ddp')
-```
-
----
-#### Multi-node
-Multi-node training is easily done by specifying these flags.
-```python
-# train on 12*8 GPUs
-trainer = Trainer(gpus=[0,1,2,3,4,5,6,7], nb_gpu_nodes=12)
-```
-
-In addition, make sure to set up your SLURM job correctly via the [SlurmClusterObject](https://williamfalcon.github.io/test-tube/hpc/SlurmCluster/). In particular, specify the number of tasks per node correctly.
-
-```python
-cluster = SlurmCluster(
-    hyperparam_optimizer=test_tube.HyperOptArgumentParser(),
-    log_path='/some/path/to/save',
-)
-
-# OPTIONAL FLAGS WHICH MAY BE CLUSTER DEPENDENT
-# which interface your nodes use for communication
-cluster.add_command('export NCCL_SOCKET_IFNAME=^docker0,lo')
-
-# see output of the NCCL connection process
-# NCCL is how the nodes talk to each other
-cluster.add_command('export NCCL_DEBUG=INFO')
-
-# setting a master port here is a good idea.
-cluster.add_command('export MASTER_PORT=%r' % PORT)
-
-# good to load the latest NCCL version
-cluster.load_modules(['NCCL/2.4.7-1-cuda.10.0'])
-
-# configure cluster
-cluster.per_experiment_nb_nodes = 12 
-cluster.per_experiment_nb_gpus = 8
-
-cluster.add_slurm_cmd(cmd='ntasks-per-node', value=8, comment='1 task per gpu')
-```
-
-Finally, make sure to add a distributed sampler to your dataset. The distributed sampler copies a 
-portion of your dataset onto each GPU. (World_size = gpus_per_node * nb_nodes).   
-
-```python
-# ie: this:
-dataset = myDataset()
-dataloader = Dataloader(dataset)
-
-# becomes:
-dataset = myDataset()
-dist_sampler = torch.utils.data.distributed.DistributedSampler(dataset)
-dataloader = Dataloader(dataset, sampler=dist_sampler)
-```
-
----
-#### Self-balancing architecture
-Here lightning distributes parts of your module across available GPUs to optimize for speed and memory.   
-
-COMING SOON.

docs/Trainer/Logging.md

@@ -1,97 +0,0 @@
-Lighting offers a few options for logging information about model, gpu usage, etc (via test-tube). It also offers printing options for training monitoring.
-
-
----
-#### Display metrics in progress bar 
-``` {.python}
-# DEFAULT
-trainer = Trainer(show_progress_bar=True)
-```
-
----
-#### Log metric row every k batches 
-Every k batches lightning will make an entry in the metrics log
-``` {.python}
-# DEFAULT (ie: save a .csv log file every 10 batches)
-trainer = Trainer(add_log_row_interval=10)
-```
-
----
-#### Process position
-When running multiple models on the same machine we want to decide which progress bar to use.
-Lightning will stack progress bars according to this value. 
-``` {.python}
-# DEFAULT
-trainer = Trainer(process_position=0)
-
-# if this is the second model on the node, show the second progress bar below
-trainer = Trainer(process_position=1)
-```
-
----
-#### Save a snapshot of all hyperparameters 
-Whenever you call .save() on the test-tube experiment it logs all the hyperparameters in current use.
-Give lightning a test-tube Experiment object to automate this for you.
-``` {.python}
-from test_tube import Experiment
-
-exp = Experiment(...)
-Trainer(experiment=exp)
-```
-
----
-#### Snapshot code for a training run
-Whenever you call .save() on the test-tube experiment it snapshows all code and pushes to a git tag.
-Give lightning a test-tube Experiment object to automate this for you.
-``` {.python}
-from test_tube import Experiment
-
-exp = Experiment(create_git_tag=True)
-Trainer(experiment=exp)
-```
-
----
-### Tensorboard support   
-In the LightningModule you can access the experiment logger by doing:
-```python
-self.experiment
-
-# add image
-# Look at PyTorch SummaryWriter docs for what you can do.   
-self.experiment.add_image(...)
-```
-
-The experiment object is a strict subclass of PyTorch SummaryWriter. However, this class
-also snapshots every detail about the experiment (data folder paths, code, hyperparams),
-and allows you to visualize it using tensorboard.
-``` {.python}
-from test_tube import Experiment, HyperOptArgumentParser
-
-# exp hyperparams
-args = HyperOptArgumentParser()
-hparams = args.parse_args()
-
-# this is a summaryWriter with nicer logging structure
-exp = Experiment(save_dir='/some/path', create_git_tag=True)
-
-# track experiment details (must be ArgumentParser or HyperOptArgumentParser).
-# each option in the parser is tracked
-exp.argparse(hparams)
-exp.tag({'description': 'running demo'})
-
-# trainer uses the exp object to log exp data
-trainer = Trainer(experiment=exp)
-trainer.fit(model)
-
-# view logs at:
-# tensorboard --logdir /some/path   
-```
-
----
-#### Write logs file to csv every k batches 
-Every k batches, lightning will write the new logs to disk
-``` {.python}
-# DEFAULT (ie: save a .csv log file every 100 batches)
-trainer = Trainer(log_save_interval=100)
-```
-

docs/Trainer/SLURM Managed Cluster.md

@@ -1,104 +0,0 @@
-Lightning supports model training on a cluster managed by SLURM in the following cases:    
-
-1. Training on single or multi-cpus only.
-2. Training on single or multi-gpus on the same node.
-3. Coming SOON: Training across multiple nodes.
-
----
-#### Running grid search on a cluster
-To use lightning to run a hyperparameter search (grid-search or random-search) on a cluster do 4 things:   
-
-(1). Define the parameters for the grid search    
-    
-```{.python}
-from test_tube import HyperOptArgumentParser
-
-# subclass of argparse
-parser = HyperOptArgumentParser(strategy='random_search')
-parser.add_argument('--learning_rate', default=0.002, type=float, help='the learning rate')
-
-# let's enable optimizing over the number of layers in the network
-parser.opt_list('--nb_layers', default=2, type=int, tunable=True, options=[2, 4, 8])
-
-hparams = parser.parse_args()    
-```    
-    
-     
-(2). Define the cluster options in the [SlurmCluster object](https://williamfalcon.github.io/test-tube/hpc/SlurmCluster/) (over 5 nodes and 8 gpus)    
-
-```{.python}
-from test_tube.hpc import SlurmCluster
-
-# hyperparameters is a test-tube hyper params object
-# see https://williamfalcon.github.io/test-tube/hyperparameter_optimization/HyperOptArgumentParser/
-hyperparams = args.parse()
-
-# init cluster
-cluster = SlurmCluster(
-    hyperparam_optimizer=hyperparams,
-    log_path='/path/to/log/results/to',
-    python_cmd='python3'
-)
-
-# let the cluster know where to email for a change in job status (ie: complete, fail, etc...)
-cluster.notify_job_status(email='some@email.com', on_done=True, on_fail=True)
-
-# set the job options. In this instance, we'll run 20 different models
-# each with its own set of hyperparameters giving each one 1 GPU (ie: taking up 20 GPUs)
-cluster.per_experiment_nb_gpus = 8
-cluster.per_experiment_nb_nodes = 5
-
-# we'll request 10GB of memory per node
-cluster.memory_mb_per_node = 10000
-
-# set a walltime of 10 minues
-cluster.job_time = '10:00'
-```
-
-(3). Give trainer the cluster_manager in your main function:    
-
-```{.python}
-from pytorch_lightning import Trainer
-
-def train_fx(trial_hparams, cluster_manager, _):
-    # hparams has a specific set of hyperparams
-    
-    my_model = MyLightningModel()
-    
-    # give the trainer the cluster object
-    trainer = Trainer(cluster=cluster_manager)
-    trainer.fit(my_model)
-
-```
-
-(4). Start the grid search     
-```{.python}
-# run the models on the cluster
-cluster.optimize_parallel_cluster_gpu(
-    train_fx, 
-    nb_trials=20, 
-    job_name='my_grid_search_exp_name', 
-    job_display_name='my_exp')
-```
-
-That's it! The SlurmCluster object will automatically checkpoint the lightning model and resubmit if it runs into the walltime!
-
-
----
-#### Walltime auto-resubmit
-Lightning automatically resubmits jobs when they reach the walltime. You get this behavior for free if you give lightning
-a slurm cluster object.
-
-```{.python}
-def my_main_fx(hparams, slurm_manager, _):
-    trainer = Trainer(cluster=slurm_manager)
-``` 
-
-(See the grid search example above for cluster configuration).
-With this feature lightning will:    
-
-1. automatically checkpoint the model
-2. checkpoint the trainer session
-3. resubmit a continuation job.
-4. load the checkpoint and trainer session in the new model
-

docs/Trainer/Training Loop.md

@@ -1,67 +0,0 @@
-The lightning training loop handles everything except the actual computations of your model. To decide what will happen in your training loop, define the [training_step function](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#training_step).
-
-Below are all the things lightning automates for you in the training loop.
-
----
-#### Accumulated gradients  
-Accumulated gradients runs K small batches of size N before doing a backwards pass. The effect is a large effective batch size of size KxN. 
-
-``` {.python}
-# DEFAULT (ie: no accumulated grads)
-trainer = Trainer(accumulate_grad_batches=1)
-```
-
----
-#### Force training for min or max epochs
-It can be useful to force training for a minimum number of epochs or limit to a max number
-``` {.python}
-# DEFAULT
-trainer = Trainer(min_nb_epochs=1, max_nb_epochs=1000)
-```
-
----
-#### Force disable early stop 
-Use this to turn off early stopping and run training to the [max_epoch](#force-training-for-min-or-max-epochs)
-``` {.python}
-# DEFAULT
-trainer = Trainer(enable_early_stop=True)
-```
-
----
-#### Gradient Clipping
-Gradient clipping may be enabled to avoid exploding gradients.
-Specifically, this will [clip the gradient norm computed over all model parameters *together*](https://pytorch.org/docs/stable/nn.html#torch.nn.utils.clip_grad_norm_).
-
-``` {.python}
-# DEFAULT (ie: don't clip)
-trainer = Trainer(gradient_clip=0)
-
-# clip gradients with norm above 0.5
-trainer = Trainer(gradient_clip=0.5)
-```
-
----
-#### Inspect gradient norms
-Looking at grad norms can help you figure out where training might be going wrong.
-``` {.python}
-# DEFAULT (-1 doesn't track norms)
-trainer = Trainer(track_grad_norm=-1)
-
-# track the LP norm (P=2 here)
-trainer = Trainer(track_grad_norm=2)
-```
-
-
----
-#### Set how much of the training set to check
-If you don't want to check 100% of the training set (for debugging or if it's huge), set this flag.
-
-train_percent_check will be overwritten by overfit_pct if `overfit_pct > 0`
-
-``` {.python}
-# DEFAULT
-trainer = Trainer(train_percent_check=1.0)
-
-# check 10% only
-trainer = Trainer(train_percent_check=0.1)
-```

docs/Trainer/Validation loop.md

@@ -1,63 +0,0 @@
-The lightning validation loop handles everything except the actual computations of your model. To decide what will happen in your validation loop, define the [validation_step function](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#validation_step).
-Below are all the things lightning automates for you in the validation loop.
-
-**Note**   
-Lightning will run 5 steps of validation in the beginning of training as a sanity check so you don't have to wait until a full epoch to catch possible validation issues.
-
-
----
-#### Check validation every n epochs
-If you have a small dataset you might want to check validation every n epochs
-``` {.python}
-# DEFAULT
-trainer = Trainer(check_val_every_n_epoch=1)
-```
-
----
-#### Set how much of the validation set to check 
-If you don't want to check 100% of the validation set (for debugging or if it's huge), set this flag
-
-val_percent_check will be overwritten by overfit_pct if `overfit_pct > 0`
-
-``` {.python}
-# DEFAULT
-trainer = Trainer(val_percent_check=1.0)
-
-# check 10% only
-trainer = Trainer(val_percent_check=0.1)
-```
-
----
-#### Set how much of the test set to check 
-If you don't want to check 100% of the test set (for debugging or if it's huge), set this flag
-
-test_percent_check will be overwritten by overfit_pct if `overfit_pct > 0`
-
-``` {.python}
-# DEFAULT
-trainer = Trainer(test_percent_check=1.0)
-
-# check 10% only
-trainer = Trainer(test_percent_check=0.1)
-```
-
----
-####  Set validation check frequency within 1 training epoch
-For large datasets it's often desirable to check validation multiple times within a training loop
-``` {.python}
-# DEFAULT
-trainer = Trainer(val_check_interval=0.95)
-
-# check every .25 of an epoch 
-trainer = Trainer(val_check_interval=0.25)
-```
-
----
-####  Set the number of validation sanity steps
-Lightning runs a few steps of validation in the beginning of training. This avoids crashing in the validation loop sometime deep into a lengthy training loop.
-``` {.python}
-# DEFAULT
-trainer = Trainer(nb_sanity_val_steps=5)
-```
-
-You can use `Trainer(nb_sanity_val_steps=0)` to skip the sanity check.

docs/Trainer/debugging.md

@@ -1,51 +0,0 @@
-These flags are useful to help debug a model.
-
----
-#### Fast dev run 
-This flag is meant for debugging a full train/val/test loop. It'll activate callbacks, everything but only with 1 training and 1 validation batch.
-Use this to debug a full run of your program quickly
-``` {.python}
-# DEFAULT
-trainer = Trainer(fast_dev_run=False)
-```
-
----
-#### Inspect gradient norms
-Looking at grad norms can help you figure out where training might be going wrong.
-``` {.python}
-# DEFAULT (-1 doesn't track norms)
-trainer = Trainer(track_grad_norm=-1)
-
-# track the LP norm (P=2 here)
-trainer = Trainer(track_grad_norm=2)
-```
-
----
-#### Make model overfit on subset of data
-A useful debugging trick is to make your model overfit a tiny fraction of the data.
-
-setting `overfit_pct > 0` will overwrite train_percent_check, val_percent_check, test_percent_check
-
-``` {.python}
-# DEFAULT don't overfit (ie: normal training)
-trainer = Trainer(overfit_pct=0.0)
-
-# overfit on 1% of data 
-trainer = Trainer(overfit_pct=0.01)
-```
-
----
-#### Print the parameter count by layer
-By default lightning prints a list of parameters *and submodules* when it starts training.
-
----
-#### Print which gradients are nan 
-This option prints a list of tensors with nan gradients.
-``` {.python}
-# DEFAULT
-trainer = Trainer(print_nan_grads=False)
-```
-
----
-#### Log GPU usage
-Lightning automatically logs gpu usage to the test tube logs. It'll only do it at the metric logging interval, so it doesn't slow down training.

docs/Trainer/hooks.md

@@ -1,141 +0,0 @@
-# Hooks
-[[Github Code](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/root_module/hooks.py)]   
-
-There are cases when you might want to do something different at different parts of the training/validation loop.
-To enable a hook, simply override the method in your LightningModule and the trainer will call it at the correct time.
-
-**Contributing** If there's a hook you'd like to add, simply:    
-1. Fork PyTorchLightning.    
-2. Add the hook [here](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/root_module/hooks.py).       
-3. Add the correct place in the [Trainer](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/models/trainer.py) where it should be called.    
-
----
-#### on_epoch_start
-Called in the training loop at the very beginning of the epoch.   
-```python
-def on_epoch_start(self):
-    # do something when the epoch starts
-```
-
----
-#### on_epoch_end
-Called in the training loop at the very end of the epoch.   
-```python
-def on_epoch_end(self):
-    # do something when the epoch ends 
-```
-
----
-#### on_batch_start
-Called in the training loop before anything happens for that batch.   
-```python
-def on_batch_start(self):
-    # do something when the batch starts
-```
-
----
-#### on_batch_end
-Called in the training loop after the batch.   
-```python
-def on_batch_end(self):
-    # do something when the batch ends 
-```
-
----
-#### on_pre_performance_check
-Called at the very beginning of the validation loop.   
-```python
-def on_pre_performance_check(self):
-    # do something before validation starts 
-```
-
----
-#### on_post_performance_check
-Called at the very end of the validation loop.   
-```python
-def on_post_performance_check(self):
-    # do something before validation end
-```
-
----
-#### on_tng_metrics
-Called in the training loop, right before metrics are logged.
-Although you can log at any time by using self.experiment, you can use
-this callback to modify what will be logged.
-```python
-def on_tng_metrics(self, metrics):
-    # do something before validation end
-```
-
----   
-#### optimizer_step 
-Calls .step() and .zero_grad for each optimizer.  
-You can override this method to adjust how you do the optimizer step for each optimizer
-
-Called once per optimizer
-```python
-# DEFAULT
-def optimizer_step(self, current_epoch, batch_nb, optimizer, optimizer_i):
-    optimizer.step()   
-    optimizer.zero_grad()   
-    
-# Alternating schedule for optimizer steps (ie: GANs)    
-def optimizer_step(self, current_epoch, batch_nb, optimizer, optimizer_i):
-    # update generator opt every 2 steps
-    if optimizer_i == 0:
-        if batch_nb % 2 == 0 :
-            optimizer.step()
-            optimizer.zero_grad()
-   
-    # update discriminator opt every 4 steps
-    if optimizer_i == 1:
-        if batch_nb % 4 == 0 :
-            optimizer.step()
-            optimizer.zero_grad()    
-    
-    # ...
-    # add as many optimizers as you want 
-```
-
-This step allows you to do a lot of non-standard training tricks such as learning-rate warm-up:   
-
-```python
-# learning rate warm-up
-def optimizer_step(self, current_epoch, batch_nb, optimizer, optimizer_i):
-    # warm up lr
-    if self.trainer.global_step < 500:
-        lr_scale = min(1., float(self.trainer.global_step + 1) / 500.)
-        for pg in optimizer.param_groups:
-            pg['lr'] = lr_scale * self.hparams.learning_rate
-    
-    # update params
-    optimizer.step()
-    optimizer.zero_grad() 
-```
-
-
----
-#### on_before_zero_grad
-Called in the training loop after taking an optimizer step and before zeroing grads.
-Good place to inspect weight information with weights updated.
-
-Called once per optimizer
-```python
-def on_before_zero_grad(self, optimizer):
-    # do something with the optimizer or inspect it. 
-```
-
----
-#### on_after_backward
-Called in the training loop after model.backward()
-This is the ideal place to inspect or log gradient information 
-```python
-def on_after_backward(self):
-    # example to inspect gradient information in tensorboard
-    if self.trainer.global_step % 25 == 0:  # don't make the tf file huge
-        params = self.state_dict()
-        for k, v in params.items():
-            grads = v
-            name = k
-            self.experiment.add_histogram(tag=name, values=grads, global_step=self.trainer.global_step)
-```

docs/Trainer/index.md

@@ -1,80 +0,0 @@
-# Trainer
-[[Github Code](https://github.com/williamFalcon/pytorch-lightning/blob/master/pytorch_lightning/models/trainer.py)]
-
-The lightning trainer abstracts best practices for running a training, val, test routine. It calls parts of your model when it wants to hand over full control and otherwise makes training assumptions which are now standard practice in AI research.
-
-This is the basic use of the trainer:
-
-``` {.python}
-from pytorch_lightning import Trainer
-
-model = LightningTemplate()
-
-trainer = Trainer()
-trainer.fit(model)
-```
-
-But of course the fun is in all the advanced things it can do:
-
-
-**Checkpointing**    
-
-- [Model saving](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving)
-- [Model loading](https://williamfalcon.github.io/pytorch-lightning/LightningModule/methods/#load-from-metrics) 
-- [Restoring training session](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#restoring-training-session)
-
-**Computing cluster (SLURM)**    
-
-- [Running grid search on a cluster](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#running-grid-search-on-a-cluster) 
-- [Walltime auto-resubmit](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#walltime-auto-resubmit)   
-
-**Debugging**  
-
-- [Fast dev run](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#fast-dev-run)
-- [Inspect gradient norms](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#inspect-gradient-norms)
-- [Log GPU usage](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#Log-gpu-usage)
-- [Make model overfit on subset of data](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#make-model-overfit-on-subset-of-data)
-- [Print the parameter count by layer](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-the-parameter-count-by-layer)
-- [Pring which gradients are nan](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-which-gradients-are-nan)
-- [Print input and output size of every module in system](https://williamfalcon.github.io/pytorch-lightning/LightningModule/properties/#example_input_array)
-
-
-**Distributed training**    
-
-- [16-bit mixed precision](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#16-bit-mixed-precision)
-- [Multi-GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-GPU)
-- [Multi-node](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-node)
-- [Single GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#single-gpu)
-- [Self-balancing architecture](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#self-balancing-architecture)
-
-
-**Experiment Logging**   
-
-- [Display metrics in progress bar](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#display-metrics-in-progress-bar)
-- [Log metric row every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#log-metric-row-every-k-batches)
-- [Process position](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#process-position)
-- [Tensorboard support](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#tensorboard-support)
-- [Save a snapshot of all hyperparameters](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#save-a-snapshot-of-all-hyperparameters) 
-- [Snapshot code for a training run](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#snapshot-code-for-a-training-run) 
-- [Write logs file to csv every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#write-logs-file-to-csv-every-k-batches)
-
-**Training loop**    
-
-- [Accumulate gradients](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#accumulated-gradients)
-- [Force training for min or max epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-training-for-min-or-max-epochs)
-- [Force disable early stop](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-disable-early-stop)
-- [Gradient Clipping](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#gradient-clipping)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Learning rate scheduling](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)
-- [Use multiple optimizers (like GANs)](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)
-- [Set how much of the training set to check (1-100%)](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#set-how-much-of-the-training-set-to-check)
-- [Step optimizers at arbitrary intervals](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step)
-
-**Validation loop**    
-
-- [Check validation every n epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#check-validation-every-n-epochs)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Set how much of the validation set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-validation-set-to-check)
-- [Set how much of the test set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-test-set-to-check)
-- [Set validation check frequency within 1 training epoch](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-validation-check-frequency-within-1-training-epoch)
-- [Set the number of validation sanity steps](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-the-number-of-validation-sanity-steps)

docs/examples/Examples.md

@@ -1,171 +0,0 @@
-### Template model definition
-In 99% of cases you want to just copy [this template](https://github.com/williamFalcon/pytorch-lightning/blob/master/examples/new_project_templates/lightning_module_template.py) to start a new lightningModule and change the core of what your model is actually trying to do.
-
-```bash
-# get a copy of the module template
-wget https://raw.githubusercontent.com/williamFalcon/pytorch-lightning/master/examples/new_project_templates/lightning_module_template.py
-```
-
----    
-### Trainer Example 
-
-** \_\_main__ function**    
-
-Normally, we want to let the \_\_main__ function start the training.
-Inside the main we parse training arguments with whatever hyperparameters we want. Your LightningModule will have a 
-chance to add hyperparameters.   
-
-```{.python}
-from test_tube import HyperOptArgumentParser
-
-if __name__ == '__main__':
-
-    # use default args given by lightning
-    root_dir = os.path.split(os.path.dirname(sys.modules['__main__'].__file__))[0]
-    parent_parser = HyperOptArgumentParser(strategy='random_search', add_help=False)
-    add_default_args(parent_parser, root_dir)
-
-    # allow model to overwrite or extend args
-    parser = ExampleModel.add_model_specific_args(parent_parser)
-    hyperparams = parser.parse_args()
-
-    # train model
-    main(hyperparams)
-```
-**Main Function**      
-
-The main function is your entry into the program. This is where you init your model, checkpoint directory, and launch the training.
-The main function should have 3 arguments:   
-- hparams: a configuration of hyperparameters.    
-- slurm_manager: Slurm cluster manager object (can be None)
-- dict: for you to return any values you want (useful in meta-learning, otherwise set to _)    
-
-```python
-def main(hparams, cluster, results_dict):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # init experiment
-    log_dir = os.path.dirname(os.path.realpath(__file__))
-    exp = Experiment(
-        name='test_tube_exp',
-        debug=True,
-        save_dir=log_dir,
-        version=0,
-        autosave=False,
-        description='test demo'
-    )
-    
-    # set the hparams for the experiment
-    exp.argparse(hparams)
-    exp.save()
-
-    # build model
-    model = MyLightningModule(hparams)
-
-    # callbacks
-    early_stop = EarlyStopping(
-        monitor=hparams.early_stop_metric,
-        patience=hparams.early_stop_patience,
-        verbose=True,
-        mode=hparams.early_stop_mode
-    )
-
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_function=None,
-        save_best_only=True,
-        verbose=True,
-        monitor=hparams.model_save_monitor_value,
-        mode=hparams.model_save_monitor_mode
-    )
-
-    # configure trainer
-    trainer = Trainer(
-        experiment=exp,
-        cluster=cluster,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-    )
-
-    # train model
-    trainer.fit(model)
-```
-
-
-
-
-The __main__ function will start training on your **main** function. If you use the HyperParameterOptimizer
-in hyper parameter optimization mode, this main function will get one set of hyperparameters. If you use it as a simple
-argument parser you get the default arguments in the argument parser.
-
-So, calling main(hyperparams) runs the model with the default argparse arguments.       
-```{.python}
-main(hyperparams)
-```
-
----
-#### CPU hyperparameter search      
-
-```{.python}
-# run a grid search over 20 hyperparameter combinations.
-hyperparams.optimize_parallel_cpu(
-    main_local,
-    nb_trials=20,
-    nb_workers=1
-)
-```
-
----
-#### Hyperparameter search on a single or multiple GPUs       
-```{.python}
-# run a grid search over 20 hyperparameter combinations.
-hyperparams.optimize_parallel_gpu(
-    main_local,
-    nb_trials=20,
-    nb_workers=1,
-    gpus=[0,1,2,3]
-)
-```
-
----
-#### Hyperparameter search on a SLURM HPC cluster   
-```{.python}    
-def optimize_on_cluster(hyperparams):
-    # enable cluster training
-    cluster = SlurmCluster(
-        hyperparam_optimizer=hyperparams,
-        log_path=hyperparams.tt_save_path,
-        test_tube_exp_name=hyperparams.tt_name
-    )
-
-    # email for cluster coms
-    cluster.notify_job_status(email='add_email_here', on_done=True, on_fail=True)
-
-    # configure cluster
-    cluster.per_experiment_nb_gpus = hyperparams.per_experiment_nb_gpus
-    cluster.job_time = '48:00:00'
-    cluster.gpu_type = '1080ti'
-    cluster.memory_mb_per_node = 48000
-
-    # any modules for code to run in env
-    cluster.add_command('source activate pytorch_lightning')
-
-    # name of exp
-    job_display_name = hyperparams.tt_name.split('_')[0]
-    job_display_name = job_display_name[0:3]
-
-    # run hopt
-    print('submitting jobs...')
-    cluster.optimize_parallel_cluster_gpu(
-        main,
-        nb_trials=hyperparams.nb_hopt_trials,
-        job_name=job_display_name
-    )
-
-# run cluster hyperparameter search    
-optimize_on_cluster(hyperparams)
-```

docs/index.md

@@ -1,139 +0,0 @@
-###### New project Quick Start    
-To start a new project define two files, a LightningModule and a Trainer file.    
-To illustrate Lightning power and simplicity, here's an example of a typical research flow.    
-
-###### Case 1: BERT    
-Let's say you're working on something like BERT but want to try different ways of training or even different networks.  
-You would define a single LightningModule and use flags to switch between your different ideas.   
-```python
-class BERT(pl.LightningModule):
-    def __init__(self, model_name, task):
-        self.task = task
-    
-        if model_name == 'transformer':
-            self.net = Transformer()
-        elif model_name == 'my_cool_version':
-            self.net = MyCoolVersion()
-            
-    def training_step(self, batch, batch_nb):
-        if self.task == 'standard_bert':
-            # do standard bert training with self.net...
-            # return loss
-            
-        if self.task == 'my_cool_task':
-            # do my own version with self.net
-            # return loss
-```   
-
-###### Case 2: COOLER NOT BERT    
-But if you wanted to try something **completely** different, you'd define a new module for that.    
-```python
-
-class CoolerNotBERT(pl.LightningModule):
-    def __init__(self):
-        self.net = ...
-        
-    def training_step(self, batch, batch_nb):
-        # do some other cool task
-        # return loss   
-```   
-
-###### Rapid research flow    
-Then you could do rapid research by switching between these two and using the same trainer.   
-```python
-
-if use_bert:
-    model = BERT()
-else:
-    model = CoolerNotBERT()
-    
-trainer = Trainer(gpus=[0, 1, 2, 3], use_amp=True)
-trainer.fit(model)
-```
-
-Notice a few things about this flow:   
-1. You're writing pure PyTorch... no unnecessary abstractions or new libraries to learn.   
-2. You get free GPU and 16-bit support without writing any of that code in your model.   
-3. You also get all of the capabilities below (without coding or testing yourself).     
-
----    
-###### Templates 
-1. [MNIST LightningModule](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#minimal-example) 
-2. [Trainer](https://williamfalcon.github.io/pytorch-lightning/Trainer/)
-    - [Basic CPU Trainer Template](https://github.com/williamFalcon/pytorch-lightning/blob/master/examples/new_project_templates/single_cpu_template.py) 
-    - [Multi-GPU Trainer Template](https://github.com/williamFalcon/pytorch-lightning/blob/master/examples/new_project_templates/single_gpu_node_template.py)
-    - [GPU cluster Trainer Template](https://github.com/williamFalcon/pytorch-lightning/blob/master/examples/new_project_templates/multi_node_cluster_template.py)
-
-###### Docs shortcuts
-- [LightningModule](LightningModule/RequiredTrainerInterface/)  
-- [Trainer](Trainer/)  
-
-###### Quick start examples 
-- [CPU example](examples/Examples/#cpu-hyperparameter-search)   
-- [Hyperparameter search on single GPU](examples/Examples/#hyperparameter-search-on-a-single-or-multiple-gpus)    
-- [Hyperparameter search on multiple GPUs on same node](examples/Examples/#hyperparameter-search-on-a-single-or-multiple-gpus)  
-- [Hyperparameter search on a SLURM HPC cluster](examples/Examples/#Hyperparameter search on a SLURM HPC cluster)      
-
-
-###### Checkpointing    
-
-- [Model saving](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving)
-- [Model loading](https://williamfalcon.github.io/pytorch-lightning/LightningModule/methods/#load-from-metrics) 
-- [Restoring training session](https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#restoring-training-session)
-
-###### Computing cluster (SLURM)    
-
-- [Running grid search on a cluster](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#running-grid-search-on-a-cluster) 
-- [Walltime auto-resubmit](https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#walltime-auto-resubmit)   
-
-###### Debugging  
-
-- [Fast dev run](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#fast-dev-run)
-- [Inspect gradient norms](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#inspect-gradient-norms)
-- [Log GPU usage](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#Log-gpu-usage)
-- [Make model overfit on subset of data](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#make-model-overfit-on-subset-of-data)
-- [Print the parameter count by layer](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-the-parameter-count-by-layer)
-- [Pring which gradients are nan](https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-which-gradients-are-nan)
-- [Print input and output size of every module in system](https://williamfalcon.github.io/pytorch-lightning/LightningModule/properties/#example_input_array)
-
-
-###### Distributed training    
-
-- [16-bit mixed precision](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#16-bit-mixed-precision)
-- [Multi-GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-GPU)
-- [Multi-node](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-node)
-- [Single GPU](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#single-gpu)
-- [Self-balancing architecture](https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#self-balancing-architecture)
-
-
-###### Experiment Logging   
-
-- [Display metrics in progress bar](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#display-metrics-in-progress-bar)
-- [Log metric row every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#log-metric-row-every-k-batches)
-- [Process position](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#process-position)
-- [Tensorboard support](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#tensorboard-support)
-- [Save a snapshot of all hyperparameters](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#save-a-snapshot-of-all-hyperparameters) 
-- [Snapshot code for a training run](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#snapshot-code-for-a-training-run) 
-- [Write logs file to csv every k batches](https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#write-logs-file-to-csv-every-k-batches)
-
-###### Training loop    
-
-- [Accumulate gradients](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#accumulated-gradients)
-- [Force training for min or max epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-training-for-min-or-max-epochs)
-- [Force disable early stop](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-disable-early-stop)
-- [Gradient Clipping](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#gradient-clipping)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Learning rate scheduling](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)
-- [Use multiple optimizers (like GANs)](https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers)
-- [Set how much of the training set to check (1-100%)](https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#set-how-much-of-the-training-set-to-check)
-- [Step optimizers at arbitrary intervals](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step)
-
-###### Validation loop    
-
-- [Check validation every n epochs](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#check-validation-every-n-epochs)
-- [Hooks](https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/)
-- [Set how much of the validation set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-validation-set-to-check)
-- [Set how much of the test set to check](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-test-set-to-check)
-- [Set validation check frequency within 1 training epoch](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-validation-check-frequency-within-1-training-epoch)
-- [Set the number of validation sanity steps](https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-the-number-of-validation-sanity-steps)
-

docs/requirements.txt

@@ -1,2 +0,0 @@
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+  <a href="#hyperparameter-search-on-a-single-or-multiple-gpus" title="Hyperparameter search on a single or multiple GPUs" class="md-nav__link">
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+  </a>
+  
+</li>
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+  <a href="#hyperparameter-search-on-a-slurm-hpc-cluster" title="Hyperparameter search on a SLURM HPC cluster" class="md-nav__link">
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+  </a>
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+  <a href="#cpu-hyperparameter-search" title="CPU hyperparameter search" class="md-nav__link">
+    CPU hyperparameter search
+  </a>
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+  <a href="#hyperparameter-search-on-a-single-or-multiple-gpus" title="Hyperparameter search on a single or multiple GPUs" class="md-nav__link">
+    Hyperparameter search on a single or multiple GPUs
+  </a>
+  
+</li>
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+  <a href="#hyperparameter-search-on-a-slurm-hpc-cluster" title="Hyperparameter search on a SLURM HPC cluster" class="md-nav__link">
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+  </a>
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+              
+                
+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/examples/Examples.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Examples</h1>
+                
+                <h3 id="template-model-definition">Template model definition</h3>
+<p>In 99% of cases you want to just copy <a href="https://github.com/williamFalcon/pytorch-lightning/tree/master/pl_examples">one of the examples</a> to start a new lightningModule and change the core of what your model is actually trying to do.</p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># get a copy of the module template</span>
+wget https://raw.githubusercontent.com/williamFalcon/pytorch-lightning/master/pl_examples/new_project_templates/lightning_module_template.py
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h3 id="trainer-example">Trainer Example</h3>
+<p><strong> __main__ function</strong>    </p>
+<p>Normally, we want to let the __main__ function start the training.
+Inside the main we parse training arguments with whatever hyperparameters we want. Your LightningModule will have a 
+chance to add hyperparameters.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="kn">from</span> <span class="nn">test_tube</span> <span class="kn">import</span> <span class="n">HyperOptArgumentParser</span>
+
+<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
+
+    <span class="c1"># use default args given by lightning</span>
+    <span class="n">root_dir</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="s1">&#39;__main__&#39;</span><span class="p">]</span><span class="o">.</span><span class="vm">__file__</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="n">parent_parser</span> <span class="o">=</span> <span class="n">HyperOptArgumentParser</span><span class="p">(</span><span class="n">strategy</span><span class="o">=</span><span class="s1">&#39;random_search&#39;</span><span class="p">,</span> <span class="n">add_help</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
+    <span class="n">add_default_args</span><span class="p">(</span><span class="n">parent_parser</span><span class="p">,</span> <span class="n">root_dir</span><span class="p">)</span>
+
+    <span class="c1"># allow model to overwrite or extend args</span>
+    <span class="n">parser</span> <span class="o">=</span> <span class="n">ExampleModel</span><span class="o">.</span><span class="n">add_model_specific_args</span><span class="p">(</span><span class="n">parent_parser</span><span class="p">)</span>
+    <span class="n">hyperparams</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
+
+    <span class="c1"># train model</span>
+    <span class="n">main</span><span class="p">(</span><span class="n">hyperparams</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p><strong>Main Function</strong>      </p>
+<p>The main function is your entry into the program. This is where you init your model, checkpoint directory, and launch the training.
+The main function should have 3 arguments: <br />
+- hparams: a configuration of hyperparameters.  <br />
+- slurm_manager: Slurm cluster manager object (can be None)
+- dict: for you to return any values you want (useful in meta-learning, otherwise set to _)    </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">def</span> <span class="nf">main</span><span class="p">(</span><span class="n">hparams</span><span class="p">,</span> <span class="n">cluster</span><span class="p">,</span> <span class="n">results_dict</span><span class="p">):</span>
+    <span class="sd">&quot;&quot;&quot;</span>
+<span class="sd">    Main training routine specific for this project</span>
+<span class="sd">    :param hparams:</span>
+<span class="sd">    :return:</span>
+<span class="sd">    &quot;&quot;&quot;</span>
+    <span class="c1"># build model</span>
+    <span class="n">model</span> <span class="o">=</span> <span class="n">MyLightningModule</span><span class="p">(</span><span class="n">hparams</span><span class="p">)</span>
+
+    <span class="c1"># configure trainer</span>
+    <span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">()</span>
+
+    <span class="c1"># train model</span>
+    <span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>The <strong>main</strong> function will start training on your <strong>main</strong> function. If you use the HyperParameterOptimizer
+in hyper parameter optimization mode, this main function will get one set of hyperparameters. If you use it as a simple
+argument parser you get the default arguments in the argument parser.</p>
+<p>So, calling main(hyperparams) runs the model with the default argparse arguments.       </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="n">main</span><span class="p">(</span><span class="n">hyperparams</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="cpu-hyperparameter-search">CPU hyperparameter search</h4>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># run a grid search over 20 hyperparameter combinations.</span>
+<span class="n">hyperparams</span><span class="o">.</span><span class="n">optimize_parallel_cpu</span><span class="p">(</span>
+    <span class="n">main_local</span><span class="p">,</span>
+    <span class="n">nb_trials</span><span class="o">=</span><span class="mi">20</span><span class="p">,</span>
+    <span class="n">nb_workers</span><span class="o">=</span><span class="mi">1</span>
+<span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="hyperparameter-search-on-a-single-or-multiple-gpus">Hyperparameter search on a single or multiple GPUs</h4>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6
+7</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="c1"># run a grid search over 20 hyperparameter combinations.</span>
+<span class="n">hyperparams</span><span class="o">.</span><span class="n">optimize_parallel_gpu</span><span class="p">(</span>
+    <span class="n">main_local</span><span class="p">,</span>
+    <span class="n">nb_trials</span><span class="o">=</span><span class="mi">20</span><span class="p">,</span>
+    <span class="n">nb_workers</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span>
+    <span class="n">gpus</span><span class="o">=</span><span class="p">[</span><span class="mi">0</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">]</span>
+<span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<hr />
+<h4 id="hyperparameter-search-on-a-slurm-hpc-cluster">Hyperparameter search on a SLURM HPC cluster</h4>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">def</span> <span class="nf">optimize_on_cluster</span><span class="p">(</span><span class="n">hyperparams</span><span class="p">):</span>
+    <span class="c1"># enable cluster training</span>
+    <span class="n">cluster</span> <span class="o">=</span> <span class="n">SlurmCluster</span><span class="p">(</span>
+        <span class="n">hyperparam_optimizer</span><span class="o">=</span><span class="n">hyperparams</span><span class="p">,</span>
+        <span class="n">log_path</span><span class="o">=</span><span class="n">hyperparams</span><span class="o">.</span><span class="n">tt_save_path</span><span class="p">,</span>
+        <span class="n">test_tube_exp_name</span><span class="o">=</span><span class="n">hyperparams</span><span class="o">.</span><span class="n">tt_name</span>
+    <span class="p">)</span>
+
+    <span class="c1"># email for cluster coms</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">notify_job_status</span><span class="p">(</span><span class="n">email</span><span class="o">=</span><span class="s1">&#39;add_email_here&#39;</span><span class="p">,</span> <span class="n">on_done</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">on_fail</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
+
+    <span class="c1"># configure cluster</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">per_experiment_nb_gpus</span> <span class="o">=</span> <span class="n">hyperparams</span><span class="o">.</span><span class="n">per_experiment_nb_gpus</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">job_time</span> <span class="o">=</span> <span class="s1">&#39;48:00:00&#39;</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">gpu_type</span> <span class="o">=</span> <span class="s1">&#39;1080ti&#39;</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">memory_mb_per_node</span> <span class="o">=</span> <span class="mi">48000</span>
+
+    <span class="c1"># any modules for code to run in env</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span><span class="s1">&#39;source activate pytorch_lightning&#39;</span><span class="p">)</span>
+
+    <span class="c1"># name of exp</span>
+    <span class="n">job_display_name</span> <span class="o">=</span> <span class="n">hyperparams</span><span class="o">.</span><span class="n">tt_name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;_&#39;</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="n">job_display_name</span> <span class="o">=</span> <span class="n">job_display_name</span><span class="p">[</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">]</span>
+
+    <span class="c1"># run hopt</span>
+    <span class="n">logging</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;submitting jobs...&#39;</span><span class="p">)</span>
+    <span class="n">cluster</span><span class="o">.</span><span class="n">optimize_parallel_cluster_gpu</span><span class="p">(</span>
+        <span class="n">main</span><span class="p">,</span>
+        <span class="n">nb_trials</span><span class="o">=</span><span class="n">hyperparams</span><span class="o">.</span><span class="n">nb_hopt_trials</span><span class="p">,</span>
+        <span class="n">job_name</span><span class="o">=</span><span class="n">job_display_name</span>
+    <span class="p">)</span>
+
+<span class="c1"># run cluster hyperparameter search    </span>
+<span class="n">optimize_on_cluster</span><span class="p">(</span><span class="n">hyperparams</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+                
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examples/__init__.py

@@ -1,5 +0,0 @@
-from .new_project_templates.lightning_module_template import LightningTemplateModel
-
-__all__ = [
-    'LightningTemplateModel'
-]

examples/new_project_templates/lightning_module_template.py

@@ -1,260 +0,0 @@
-"""
-Example template for defining a system
-"""
-import os
-from collections import OrderedDict
-import torch.nn as nn
-from torchvision.datasets import MNIST
-import torchvision.transforms as transforms
-import torch
-import torch.nn.functional as F
-from test_tube import HyperOptArgumentParser
-from torch import optim
-from torch.utils.data import DataLoader
-from torch.utils.data.distributed import DistributedSampler
-
-import pytorch_lightning as pl
-from pytorch_lightning.root_module.root_module import LightningModule
-
-
-class LightningTemplateModel(LightningModule):
-    """
-    Sample model to show how to define a template
-    """
-
-    def __init__(self, hparams):
-        """
-        Pass in parsed HyperOptArgumentParser to the model
-        :param hparams:
-        """
-        # init superclass
-        super(LightningTemplateModel, self).__init__()
-        self.hparams = hparams
-
-        self.batch_size = hparams.batch_size
-
-        # if you specify an example input, the summary will show input/output for each layer
-        self.example_input_array = torch.rand(5, 28 * 28)
-
-        # build model
-        self.__build_model()
-
-    # ---------------------
-    # MODEL SETUP
-    # ---------------------
-    def __build_model(self):
-        """
-        Layout model
-        :return:
-        """
-        self.c_d1 = nn.Linear(in_features=self.hparams.in_features,
-                              out_features=self.hparams.hidden_dim)
-        self.c_d1_bn = nn.BatchNorm1d(self.hparams.hidden_dim)
-        self.c_d1_drop = nn.Dropout(self.hparams.drop_prob)
-
-        self.c_d2 = nn.Linear(in_features=self.hparams.hidden_dim,
-                              out_features=self.hparams.out_features)
-
-    # ---------------------
-    # TRAINING
-    # ---------------------
-    def forward(self, x):
-        """
-        No special modification required for lightning, define as you normally would
-        :param x:
-        :return:
-        """
-
-        x = self.c_d1(x)
-        x = torch.tanh(x)
-        x = self.c_d1_bn(x)
-        x = self.c_d1_drop(x)
-
-        x = self.c_d2(x)
-        logits = F.log_softmax(x, dim=1)
-
-        return logits
-
-    def loss(self, labels, logits):
-        nll = F.nll_loss(logits, labels)
-        return nll
-
-    def training_step(self, data_batch, batch_i):
-        """
-        Lightning calls this inside the training loop
-        :param data_batch:
-        :return:
-        """
-        # forward pass
-        x, y = data_batch
-        x = x.view(x.size(0), -1)
-
-        y_hat = self.forward(x)
-
-        # calculate loss
-        loss_val = self.loss(y, y_hat)
-
-        # in DP mode (default) make sure if result is scalar, there's another dim in the beginning
-        if self.trainer.use_dp:
-            loss_val = loss_val.unsqueeze(0)
-
-        output = OrderedDict({
-            'loss': loss_val
-        })
-
-        # can also return just a scalar instead of a dict (return loss_val)
-        return output
-
-    def validation_step(self, data_batch, batch_i):
-        """
-        Lightning calls this inside the validation loop
-        :param data_batch:
-        :return:
-        """
-        x, y = data_batch
-        x = x.view(x.size(0), -1)
-        y_hat = self.forward(x)
-
-        loss_val = self.loss(y, y_hat)
-
-        # acc
-        labels_hat = torch.argmax(y_hat, dim=1)
-        val_acc = torch.sum(y == labels_hat).item() / (len(y) * 1.0)
-        val_acc = torch.tensor(val_acc)
-
-        if self.on_gpu:
-            val_acc = val_acc.cuda(loss_val.device.index)
-
-        # in DP mode (default) make sure if result is scalar, there's another dim in the beginning
-        if self.trainer.use_dp:
-            loss_val = loss_val.unsqueeze(0)
-            val_acc = val_acc.unsqueeze(0)
-
-        output = OrderedDict({
-            'val_loss': loss_val,
-            'val_acc': val_acc,
-        })
-
-        # can also return just a scalar instead of a dict (return loss_val)
-        return output
-
-    def validation_end(self, outputs):
-        """
-        Called at the end of validation to aggregate outputs
-        :param outputs: list of individual outputs of each validation step
-        :return:
-        """
-        # if returned a scalar from validation_step, outputs is a list of tensor scalars
-        # we return just the average in this case (if we want)
-        # return torch.stack(outputs).mean()
-
-        val_loss_mean = 0
-        val_acc_mean = 0
-        for output in outputs:
-            val_loss = output['val_loss']
-
-            # reduce manually when using dp
-            if self.trainer.use_dp:
-                val_loss = torch.mean(val_loss)
-            val_loss_mean += val_loss
-
-            # reduce manually when using dp
-            val_acc = output['val_acc']
-            if self.trainer.use_dp:
-                val_acc = torch.mean(val_acc)
-
-            val_acc_mean += val_acc
-
-        val_loss_mean /= len(outputs)
-        val_acc_mean /= len(outputs)
-        tqdm_dic = {'val_loss': val_loss_mean, 'val_acc': val_acc_mean}
-        return tqdm_dic
-
-    # ---------------------
-    # TRAINING SETUP
-    # ---------------------
-    def configure_optimizers(self):
-        """
-        return whatever optimizers we want here
-        :return: list of optimizers
-        """
-        optimizer = optim.Adam(self.parameters(), lr=self.hparams.learning_rate)
-        scheduler = optim.lr_scheduler.CosineAnnealingLR(optimizer, T_max=10)
-        return [optimizer], [scheduler]
-
-    def __dataloader(self, train):
-        # init data generators
-        transform = transforms.Compose([transforms.ToTensor(),
-                                        transforms.Normalize((0.5,), (1.0,))])
-        dataset = MNIST(root=self.hparams.data_root, train=train,
-                        transform=transform, download=True)
-
-        # when using multi-node (ddp) we need to add the datasampler
-        train_sampler = None
-        batch_size = self.hparams.batch_size
-
-        if self.use_ddp:
-            train_sampler = DistributedSampler(dataset, rank=self.trainer.proc_rank)
-            batch_size = batch_size // self.trainer.world_size  # scale batch size
-
-        should_shuffle = train_sampler is None
-        loader = DataLoader(
-            dataset=dataset,
-            batch_size=batch_size,
-            shuffle=should_shuffle,
-            sampler=train_sampler
-        )
-
-        return loader
-
-    @pl.data_loader
-    def tng_dataloader(self):
-        print('tng data loader called')
-        return self.__dataloader(train=True)
-
-    @pl.data_loader
-    def val_dataloader(self):
-        print('val data loader called')
-        return self.__dataloader(train=False)
-
-    @pl.data_loader
-    def test_dataloader(self):
-        print('test data loader called')
-        return self.__dataloader(train=False)
-
-    @staticmethod
-    def add_model_specific_args(parent_parser, root_dir):  # pragma: no cover
-        """
-        Parameters you define here will be available to your model through self.hparams
-        :param parent_parser:
-        :param root_dir:
-        :return:
-        """
-        parser = HyperOptArgumentParser(strategy=parent_parser.strategy, parents=[parent_parser])
-
-        # param overwrites
-        # parser.set_defaults(gradient_clip=5.0)
-
-        # network params
-        parser.add_argument('--in_features', default=28 * 28, type=int)
-        parser.add_argument('--out_features', default=10, type=int)
-        # use 500 for CPU, 50000 for GPU to see speed difference
-        parser.add_argument('--hidden_dim', default=50000, type=int)
-        parser.opt_list('--drop_prob', default=0.2, options=[0.2, 0.5], type=float, tunable=False)
-
-        # data
-        parser.add_argument('--data_root', default=os.path.join(root_dir, 'mnist'), type=str)
-
-        # training params (opt)
-        parser.opt_list('--learning_rate', default=0.001 * 8, type=float,
-                        options=[0.0001, 0.0005, 0.001, 0.005],
-                        tunable=False)
-        parser.opt_list('--optimizer_name', default='adam', type=str,
-                        options=['adam'], tunable=False)
-
-        # if using 2 nodes with 4 gpus each the batch size here
-        #  (256) will be 256 / (2*8) = 16 per gpu
-        parser.opt_list('--batch_size', default=256 * 8, type=int,
-                        options=[32, 64, 128, 256], tunable=False,
-                        help='batch size will be divided over all gpus being used across all nodes')
-        return parser

examples/new_project_templates/multi_node_cluster_template.py

@@ -1,172 +0,0 @@
-"""
-Multi-node example (GPU)
-"""
-import os
-import numpy as np
-from time import sleep
-import torch
-
-from test_tube import HyperOptArgumentParser, Experiment, SlurmCluster
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-SEED = 2334
-torch.manual_seed(SEED)
-np.random.seed(SEED)
-
-
-def main_local(hparams):
-    main(hparams, None, None)
-
-
-def main(hparams, cluster, results_dict):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # ------------------------
-    # 1 INIT LIGHTNING MODEL
-    # ------------------------
-    print('loading model...')
-    model = LightningTemplateModel(hparams)
-    print('model built')
-
-    # ------------------------
-    # 2 INIT TEST TUBE EXP
-    # ------------------------
-    # when using grid search, it's possible for all models to start at once
-    # and use the same test tube experiment version
-    relative_node_id = int(os.environ['SLURM_NODEID'])
-    sleep(relative_node_id + 1)
-
-    # init experiment
-    exp = Experiment(
-        name=hyperparams.experiment_name,
-        save_dir=hyperparams.test_tube_save_path,
-        autosave=False,
-        description='test demo'
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # ------------------------
-    # 3 DEFINE CALLBACKS
-    # ------------------------
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        verbose=True,
-        mode='max'
-    )
-
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_loss',
-        mode='min'
-    )
-
-    # ------------------------
-    # 4 INIT TRAINER
-    # ------------------------
-    trainer = Trainer(
-        experiment=exp,
-        cluster=cluster,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-        gpus=hparams.gpus,
-        nb_gpu_nodes=hyperparams.nb_gpu_nodes
-    )
-
-    # ------------------------
-    # 5 START TRAINING
-    # ------------------------
-    trainer.fit(model)
-
-
-def optimize_on_cluster(hyperparams):
-    # enable cluster training
-    # log all scripts to the test tube folder
-    cluster = SlurmCluster(
-        hyperparam_optimizer=hyperparams,
-        log_path=hyperparams.slurm_log_path,
-    )
-
-    # email for cluster coms
-    cluster.notify_job_status(email='add_email_here', on_done=True, on_fail=True)
-
-    # configure cluster
-    cluster.per_experiment_nb_gpus = hyperparams.per_experiment_nb_gpus
-    cluster.per_experiment_nb_nodes = hyperparams.nb_gpu_nodes
-    cluster.job_time = '2:00:00'
-    cluster.gpu_type = 'volta'
-    cluster.memory_mb_per_node = 0
-
-    # any modules for code to run in env
-    cluster.add_command('source activate lightning')
-
-    # run only on 32GB voltas
-    cluster.add_slurm_cmd(cmd='constraint', value='volta32gb',
-                          comment='use 32gb gpus')
-    cluster.add_slurm_cmd(cmd='partition', value=hyperparams.gpu_partition,
-                          comment='use 32gb gpus')
-
-    # run hopt
-    # creates and submits jobs to slurm
-    cluster.optimize_parallel_cluster_gpu(
-        main,
-        nb_trials=hyperparams.nb_hopt_trials,
-        job_name=hyperparams.experiment_name
-    )
-
-
-if __name__ == '__main__':
-
-    # use default args
-    root_dir = os.path.dirname(os.path.realpath(__file__))
-    demo_log_dir = os.path.join(root_dir, 'pt_lightning_demo_logs')
-
-    checkpoint_dir = os.path.join(demo_log_dir, 'model_weights')
-    test_tube_dir = os.path.join(demo_log_dir, 'test_tube_data')
-    slurm_out_dir = os.path.join(demo_log_dir, 'slurm_scripts')
-
-    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
-
-    # cluster args not defined inside the model
-    parent_parser.add_argument('--gpu_partition', type=str, help='consult your cluster manual')
-
-    # TODO: make 1 param
-    parent_parser.add_argument('--per_experiment_nb_gpus', type=int,
-                               help='how many gpus to use in a node')
-    parent_parser.add_argument('--gpus', type=str, default='-1',
-                               help='how many gpus to use in the node')
-
-    parent_parser.add_argument('--nb_gpu_nodes', type=int, default=1,
-                               help='how many nodes to use in a cluster')
-    parent_parser.add_argument('--test_tube_save_path', type=str, default=test_tube_dir,
-                               help='where to save logs')
-    parent_parser.add_argument('--slurm_log_path', type=str, default=slurm_out_dir,
-                               help='where to save slurm meta')
-    parent_parser.add_argument('--model_save_path', type=str, default=checkpoint_dir,
-                               help='where to save model')
-    parent_parser.add_argument('--experiment_name', type=str, default='pt_lightning_exp_a',
-                               help='test tube exp name')
-    parent_parser.add_argument('--nb_hopt_trials', type=int, default=1,
-                               help='how many grid search trials to run')
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser, root_dir)
-    hyperparams = parser.parse_args()
-
-    # ---------------------
-    # RUN TRAINING
-    # ---------------------
-    # run on HPC cluster
-    print('RUNNING ON SLURM CLUSTER')
-    optimize_on_cluster(hyperparams)

examples/new_project_templates/single_cpu_template.py

@@ -1,109 +0,0 @@
-"""
-Runs a model on a single node on CPU only..
-"""
-import os
-import numpy as np
-import torch
-
-from test_tube import HyperOptArgumentParser, Experiment
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-SEED = 2334
-torch.manual_seed(SEED)
-np.random.seed(SEED)
-
-
-def main(hparams):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # ------------------------
-    # 1 INIT LIGHTNING MODEL
-    # ------------------------
-    print('loading model...')
-    model = LightningTemplateModel(hparams)
-    print('model built')
-
-    # ------------------------
-    # 2 INIT TEST TUBE EXP
-    # ------------------------
-
-    # init experiment
-    exp = Experiment(
-        name=hyperparams.experiment_name,
-        save_dir=hyperparams.test_tube_save_path,
-        autosave=False,
-        description='test demo'
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # ------------------------
-    # 3 DEFINE CALLBACKS
-    # ------------------------
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        verbose=True,
-        mode='max'
-    )
-
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_loss',
-        mode='min'
-    )
-
-    # ------------------------
-    # 4 INIT TRAINER
-    # ------------------------
-    trainer = Trainer(
-        experiment=exp,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-    )
-
-    # ------------------------
-    # 5 START TRAINING
-    # ------------------------
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-
-    # dirs
-    root_dir = os.path.dirname(os.path.realpath(__file__))
-    demo_log_dir = os.path.join(root_dir, 'pt_lightning_demo_logs')
-    checkpoint_dir = os.path.join(demo_log_dir, 'model_weights')
-    test_tube_dir = os.path.join(demo_log_dir, 'test_tube_data')
-
-    # although we user hyperOptParser, we are using it only as argparse right now
-    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
-
-    # gpu args
-    parent_parser.add_argument('--test_tube_save_path', type=str,
-                               default=test_tube_dir, help='where to save logs')
-    parent_parser.add_argument('--model_save_path', type=str,
-                               default=checkpoint_dir, help='where to save model')
-    parent_parser.add_argument('--experiment_name', type=str,
-                               default='pt_lightning_exp_a', help='test tube exp name')
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser, root_dir)
-    hyperparams = parser.parse_args()
-
-    # ---------------------
-    # RUN TRAINING
-    # ---------------------
-    # run on HPC cluster
-    print('RUNNING ON CPU')
-    main(hyperparams)

examples/new_project_templates/single_gpu_node_16bit_template.py

@@ -1,114 +0,0 @@
-"""
-16-bit single node, CPU example
-"""
-import os
-import numpy as np
-import torch
-
-from test_tube import HyperOptArgumentParser, Experiment
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-SEED = 2334
-torch.manual_seed(SEED)
-np.random.seed(SEED)
-
-
-def main(hparams):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # ------------------------
-    # 1 INIT LIGHTNING MODEL
-    # ------------------------
-    print('loading model...')
-    model = LightningTemplateModel(hparams)
-    print('model built')
-
-    # ------------------------
-    # 2 INIT TEST TUBE EXP
-    # ------------------------
-
-    # init experiment
-    exp = Experiment(
-        name=hyperparams.experiment_name,
-        save_dir=hyperparams.test_tube_save_path,
-        autosave=False,
-        description='test demo'
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # ------------------------
-    # 3 DEFINE CALLBACKS
-    # ------------------------
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        verbose=True,
-        mode='max'
-    )
-
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_loss',
-        mode='min'
-    )
-
-    # ------------------------
-    # 4 INIT TRAINER
-    # ------------------------
-    trainer = Trainer(
-        experiment=exp,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-        gpus=hparams.gpus,
-        use_amp=True
-    )
-
-    # ------------------------
-    # 5 START TRAINING
-    # ------------------------
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-
-    # dirs
-    root_dir = os.path.dirname(os.path.realpath(__file__))
-    demo_log_dir = os.path.join(root_dir, 'pt_lightning_demo_logs')
-    checkpoint_dir = os.path.join(demo_log_dir, 'model_weights')
-    test_tube_dir = os.path.join(demo_log_dir, 'test_tube_data')
-
-    # although we user hyperOptParser, we are using it only as argparse right now
-    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
-
-    # gpu args
-    parent_parser.add_argument('--gpus', type=str, default='-1',
-                               help='how many gpus to use in the node.'
-                                    'value -1 uses all the gpus on the node')
-    parent_parser.add_argument('--test_tube_save_path', type=str, default=test_tube_dir,
-                               help='where to save logs')
-    parent_parser.add_argument('--model_save_path', type=str, default=checkpoint_dir,
-                               help='where to save model')
-    parent_parser.add_argument('--experiment_name', type=str, default='pt_lightning_exp_a',
-                               help='test tube exp name')
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser, root_dir)
-    hyperparams = parser.parse_args()
-
-    # ---------------------
-    # RUN TRAINING
-    # ---------------------
-    # run on HPC cluster
-    print(f'RUNNING INTERACTIVE MODE ON GPUS. gpu ids: {hyperparams.gpus}')
-    main(hyperparams)

examples/new_project_templates/single_gpu_node_ddp_template.py

@@ -1,114 +0,0 @@
-"""
-Runs a model on a single node across N-gpus.
-"""
-import os
-import numpy as np
-import torch
-
-from test_tube import HyperOptArgumentParser, Experiment
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-SEED = 2334
-torch.manual_seed(SEED)
-np.random.seed(SEED)
-
-
-def main(hparams):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # ------------------------
-    # 1 INIT LIGHTNING MODEL
-    # ------------------------
-    print('loading model...')
-    model = LightningTemplateModel(hparams)
-    print('model built')
-
-    # ------------------------
-    # 2 INIT TEST TUBE EXP
-    # ------------------------
-
-    # init experiment
-    exp = Experiment(
-        name=hyperparams.experiment_name,
-        save_dir=hyperparams.test_tube_save_path,
-        autosave=False,
-        description='test demo'
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # ------------------------
-    # 3 DEFINE CALLBACKS
-    # ------------------------
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        verbose=True,
-        mode='max'
-    )
-
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_loss',
-        mode='min'
-    )
-
-    # ------------------------
-    # 4 INIT TRAINER
-    # ------------------------
-    trainer = Trainer(
-        experiment=exp,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-        gpus=hparams.gpus,
-        distributed_backend='ddp'
-    )
-
-    # ------------------------
-    # 5 START TRAINING
-    # ------------------------
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-
-    # dirs
-    root_dir = os.path.dirname(os.path.realpath(__file__))
-    demo_log_dir = os.path.join(root_dir, 'pt_lightning_demo_logs')
-    checkpoint_dir = os.path.join(demo_log_dir, 'model_weights')
-    test_tube_dir = os.path.join(demo_log_dir, 'test_tube_data')
-
-    # although we user hyperOptParser, we are using it only as argparse right now
-    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
-
-    # gpu args
-    parent_parser.add_argument('--gpus', type=str, default='-1',
-                               help='how many gpus to use in the node.'
-                                    ' value -1 uses all the gpus on the node')
-    parent_parser.add_argument('--test_tube_save_path', type=str, default=test_tube_dir,
-                               help='where to save logs')
-    parent_parser.add_argument('--model_save_path', type=str, default=checkpoint_dir,
-                               help='where to save model')
-    parent_parser.add_argument('--experiment_name', type=str, default='pt_lightning_exp_a',
-                               help='test tube exp name')
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser, root_dir)
-    hyperparams = parser.parse_args()
-
-    # ---------------------
-    # RUN TRAINING
-    # ---------------------
-    # run on HPC cluster
-    print(f'RUNNING INTERACTIVE MODE ON GPUS. gpu ids: {hyperparams.gpus}')
-    main(hyperparams)

examples/new_project_templates/single_gpu_node_dp_template.py

@@ -1,113 +0,0 @@
-"""
-Runs a model on a single node across N-gpus using dataParallel
-"""
-import os
-import numpy as np
-import torch
-
-from test_tube import HyperOptArgumentParser, Experiment
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-SEED = 2334
-torch.manual_seed(SEED)
-np.random.seed(SEED)
-
-
-def main(hparams):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # ------------------------
-    # 1 INIT LIGHTNING MODEL
-    # ------------------------
-    print('loading model...')
-    model = LightningTemplateModel(hparams)
-    print('model built')
-
-    # ------------------------
-    # 2 INIT TEST TUBE EXP
-    # ------------------------
-
-    # init experiment
-    exp = Experiment(
-        name=hyperparams.experiment_name,
-        save_dir=hyperparams.test_tube_save_path,
-        autosave=False,
-        description='test demo'
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # ------------------------
-    # 3 DEFINE CALLBACKS
-    # ------------------------
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        verbose=True,
-        mode='max'
-    )
-
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_loss',
-        mode='min'
-    )
-
-    # ------------------------
-    # 4 INIT TRAINER
-    # ------------------------
-    trainer = Trainer(
-        experiment=exp,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-        gpus=hparams.gpus,
-    )
-
-    # ------------------------
-    # 5 START TRAINING
-    # ------------------------
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-
-    # dirs
-    root_dir = os.path.dirname(os.path.realpath(__file__))
-    demo_log_dir = os.path.join(root_dir, 'pt_lightning_demo_logs')
-    checkpoint_dir = os.path.join(demo_log_dir, 'model_weights')
-    test_tube_dir = os.path.join(demo_log_dir, 'test_tube_data')
-
-    # although we user hyperOptParser, we are using it only as argparse right now
-    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
-
-    # gpu args
-    parent_parser.add_argument('--gpus', type=str, default='-1',
-                               help='how many gpus to use in the node.'
-                                    ' value -1 uses all the gpus on the node')
-    parent_parser.add_argument('--test_tube_save_path', type=str, default=test_tube_dir,
-                               help='where to save logs')
-    parent_parser.add_argument('--model_save_path', type=str, default=checkpoint_dir,
-                               help='where to save model')
-    parent_parser.add_argument('--experiment_name', type=str, default='pt_lightning_exp_a',
-                               help='test tube exp name')
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser, root_dir)
-    hyperparams = parser.parse_args()
-
-    # ---------------------
-    # RUN TRAINING
-    # ---------------------
-    # run on HPC cluster
-    print(f'RUNNING INTERACTIVE MODE ON GPUS. gpu ids: {hyperparams.gpus}')
-    main(hyperparams)

examples/new_project_templates/trainer_cpu_template.py

@@ -1,74 +0,0 @@
-import os
-import sys
-
-from test_tube import HyperOptArgumentParser, Experiment
-from pytorch_lightning.models.trainer import Trainer
-from pytorch_lightning.utilities.arg_parse import add_default_args
-from pytorch_lightning.callbacks.pt_callbacks import EarlyStopping, ModelCheckpoint
-
-from examples.new_project_templates.lightning_module_template import LightningTemplateModel
-
-
-def main(hparams):
-    """
-    Main training routine specific for this project
-    :param hparams:
-    :return:
-    """
-    # init experiment
-    exp = Experiment(
-        name=hparams.tt_name,
-        debug=hparams.debug,
-        save_dir=hparams.tt_save_path,
-        version=hparams.hpc_exp_number,
-        autosave=False,
-        description=hparams.tt_description
-    )
-
-    exp.argparse(hparams)
-    exp.save()
-
-    # build model
-    model = LightningTemplateModel(hparams)
-
-    # callbacks
-    early_stop = EarlyStopping(
-        monitor='val_acc',
-        patience=3,
-        mode='min',
-        verbose=True,
-    )
-
-    model_save_path = '{}/{}/{}'.format(hparams.model_save_path, exp.name, exp.version)
-    checkpoint = ModelCheckpoint(
-        filepath=model_save_path,
-        save_best_only=True,
-        verbose=True,
-        monitor='val_acc',
-        mode='min'
-    )
-
-    # configure trainer
-    trainer = Trainer(
-        experiment=exp,
-        checkpoint_callback=checkpoint,
-        early_stop_callback=early_stop,
-    )
-
-    # train model
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-
-    # use default args given by lightning
-    root_dir = os.path.split(os.path.dirname(sys.modules['__main__'].__file__))[0]
-    parent_parser = HyperOptArgumentParser(strategy='random_search', add_help=False)
-    add_default_args(parent_parser, root_dir)
-
-    # allow model to overwrite or extend args
-    parser = LightningTemplateModel.add_model_specific_args(parent_parser)
-    hyperparams = parser.parse_args()
-
-    # train model
-    main(hyperparams)

examples/templates/gan.py

@@ -1,178 +0,0 @@
-"""
-To run this template just do:  
-python gan.py   
-
-After a few epochs, launch tensorboard to see the images being generated at every batch.   
-
-tensorboard --logdir default
-"""
-from argparse import ArgumentParser
-import os
-import numpy as np
-
-import torchvision
-import torchvision.transforms as transforms
-from torchvision.datasets import MNIST
-
-from torch.utils.data import DataLoader
-
-import torch.nn as nn
-import torch.nn.functional as F
-import torch
-
-import pytorch_lightning as pl
-from test_tube import Experiment
-
-
-class Generator(nn.Module):
-    def __init__(self, latent_dim, img_shape):
-        super(Generator, self).__init__()
-        self.img_shape = img_shape
-
-        def block(in_feat, out_feat, normalize=True):
-            layers = [nn.Linear(in_feat, out_feat)]
-            if normalize:
-                layers.append(nn.BatchNorm1d(out_feat, 0.8))
-            layers.append(nn.LeakyReLU(0.2, inplace=True))
-            return layers
-
-        self.model = nn.Sequential(
-            *block(latent_dim, 128, normalize=False),
-            *block(128, 256),
-            *block(256, 512),
-            *block(512, 1024),
-            nn.Linear(1024, int(np.prod(img_shape))),
-            nn.Tanh()
-        )
-
-    def forward(self, z):
-        img = self.model(z)
-        img = img.view(img.size(0), *self.img_shape)
-        return img
-
-
-class Discriminator(nn.Module):
-    def __init__(self, img_shape):
-        super(Discriminator, self).__init__()
-
-        self.model = nn.Sequential(
-            nn.Linear(int(np.prod(img_shape)), 512),
-            nn.LeakyReLU(0.2, inplace=True),
-            nn.Linear(512, 256),
-            nn.LeakyReLU(0.2, inplace=True),
-            nn.Linear(256, 1),
-            nn.Sigmoid(),
-        )
-
-    def forward(self, img):
-        img_flat = img.view(img.size(0), -1)
-        validity = self.model(img_flat)
-
-        return validity
-
-
-class GAN(pl.LightningModule):
-
-    def __init__(self, hparams):
-        super(GAN, self).__init__()
-        self.hparams = hparams
-
-        # networks
-        mnist_shape = (1, 28, 28)
-        self.generator = Generator(latent_dim=hparams.latent_dim, img_shape=mnist_shape)
-        self.discriminator = Discriminator(img_shape=mnist_shape)
-
-        # cache for generated images
-        self.generated_imgs = None
-
-    def forward(self, z):
-        return self.generator(z)
-
-    def adversarial_loss(self, y_hat, y):
-        return F.binary_cross_entropy(y_hat, y)
-
-    def training_step(self, batch, batch_nb, optimizer_i):
-        imgs, _ = batch
-
-        # train generator
-        if optimizer_i == 0:
-            # sample noise
-            z = torch.randn(imgs.shape[0], self.hparams.latent_dim)
-
-            # match gpu device (or keep as cpu)
-            if self.on_gpu:
-                z = z.cuda(imgs.device.index)
-
-            # generate images
-            self.generated_imgs = self.forward(z)
-
-            # log sampled images
-            sample_imgs = self.generated_imgs[:6]
-            grid = torchvision.utils.make_grid(sample_imgs)
-            self.experiment.add_image('generated_images', grid, 0)
-
-            # ground truth result (ie: all fake)
-            valid = torch.ones(imgs.size(0), 1)
-
-            # adversarial loss is binary cross-entropy
-            g_loss = self.adversarial_loss(self.discriminator(self.generated_imgs), valid)
-
-            return g_loss
-
-        # train discriminator
-        if optimizer_i == 1:
-            # Measure discriminator's ability to classify real from generated samples
-
-            # how well can it label as real?
-            valid = torch.ones(imgs.size(0), 1)
-            real_loss = self.adversarial_loss(self.discriminator(imgs), valid)
-
-            # how well can it label as fake?
-            fake = torch.zeros(imgs.size(0), 1)
-            fake_loss = self.adversarial_loss(self.discriminator(self.generated_imgs.detach()), fake)
-
-            # discriminator loss is the average of these
-            d_loss = (real_loss + fake_loss) / 2
-
-            return d_loss
-
-    def configure_optimizers(self):
-        lr = self.hparams.lr
-        b1 = self.hparams.b1
-        b2 = self.hparams.b2
-
-        opt_g = torch.optim.Adam(self.generator.parameters(), lr=lr, betas=(b1, b2))
-        opt_d = torch.optim.Adam(self.discriminator.parameters(), lr=lr, betas=(b1, b2))
-        return [opt_g, opt_d], []
-
-    @pl.data_loader
-    def tng_dataloader(self):
-        transform = transforms.Compose([transforms.ToTensor(),
-                                        transforms.Normalize([0.5], [0.5])])
-        dataset = MNIST(os.getcwd(), train=True, download=True, transform=transform)
-        return DataLoader(dataset, batch_size=self.hparams.batch_size)
-
-
-def main(hparams):
-    # save tensorboard logs
-    exp = Experiment(save_dir=os.getcwd())
-
-    # init model
-    model = GAN(hparams)
-
-    # fit trainer on CPU
-    trainer = pl.Trainer(experiment=exp, max_nb_epochs=200)
-    trainer.fit(model)
-
-
-if __name__ == '__main__':
-    parser = ArgumentParser()
-    parser.add_argument("--batch_size", type=int, default=64, help="size of the batches")
-    parser.add_argument("--lr", type=float, default=0.0002, help="adam: learning rate")
-    parser.add_argument("--b1", type=float, default=0.5, help="adam: decay of first order momentum of gradient")
-    parser.add_argument("--b2", type=float, default=0.999, help="adam: decay of first order momentum of gradient")
-    parser.add_argument("--latent_dim", type=int, default=100, help="dimensionality of the latent space")
-
-    hparams = parser.parse_args()
-
-    main(hparams)

index.html

@@ -0,0 +1,973 @@
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+                  <a href="https://github.com/williamFalcon/pytorch-lightning/edit/master/docs/index.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Home</h1>
+                
+                <h6 id="new-project-quick-start">New project Quick Start</h6>
+<p>To start a new project define two files, a LightningModule and a Trainer file.  <br />
+To illustrate Lightning power and simplicity, here's an example of a typical research flow.    </p>
+<h6 id="case-1-bert">Case 1: BERT</h6>
+<p>Let's say you're working on something like BERT but want to try different ways of training or even different networks.<br />
+You would define a single LightningModule and use flags to switch between your different ideas.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
+ 9
+10
+11
+12
+13
+14
+15
+16
+17</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">class</span> <span class="nc">BERT</span><span class="p">(</span><span class="n">pl</span><span class="o">.</span><span class="n">LightningModule</span><span class="p">):</span>
+    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">model_name</span><span class="p">,</span> <span class="n">task</span><span class="p">):</span>
+        <span class="bp">self</span><span class="o">.</span><span class="n">task</span> <span class="o">=</span> <span class="n">task</span>
+
+        <span class="k">if</span> <span class="n">model_name</span> <span class="o">==</span> <span class="s1">&#39;transformer&#39;</span><span class="p">:</span>
+            <span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="n">Transformer</span><span class="p">()</span>
+        <span class="k">elif</span> <span class="n">model_name</span> <span class="o">==</span> <span class="s1">&#39;my_cool_version&#39;</span><span class="p">:</span>
+            <span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="n">MyCoolVersion</span><span class="p">()</span>
+
+    <span class="k">def</span> <span class="nf">training_step</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">batch</span><span class="p">,</span> <span class="n">batch_nb</span><span class="p">):</span>
+        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">task</span> <span class="o">==</span> <span class="s1">&#39;standard_bert&#39;</span><span class="p">:</span>
+            <span class="c1"># do standard bert training with self.net...</span>
+            <span class="c1"># return loss</span>
+
+        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">task</span> <span class="o">==</span> <span class="s1">&#39;my_cool_task&#39;</span><span class="p">:</span>
+            <span class="c1"># do my own version with self.net</span>
+            <span class="c1"># return loss</span>
+</pre></div>
+</td></tr></table>
+
+<h6 id="case-2-cooler-not-bert">Case 2: COOLER NOT BERT</h6>
+<p>But if you wanted to try something <strong>completely</strong> different, you'd define a new module for that.    </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6
+7</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">class</span> <span class="nc">CoolerNotBERT</span><span class="p">(</span><span class="n">pl</span><span class="o">.</span><span class="n">LightningModule</span><span class="p">):</span>
+    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
+        <span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="o">...</span>
+
+    <span class="k">def</span> <span class="nf">training_step</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">batch</span><span class="p">,</span> <span class="n">batch_nb</span><span class="p">):</span>
+        <span class="c1"># do some other cool task</span>
+        <span class="c1"># return loss   </span>
+</pre></div>
+</td></tr></table>
+
+<h6 id="rapid-research-flow">Rapid research flow</h6>
+<p>Then you could do rapid research by switching between these two and using the same trainer.   </p>
+<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre>1
+2
+3
+4
+5
+6
+7</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="k">if</span> <span class="n">use_bert</span><span class="p">:</span>
+    <span class="n">model</span> <span class="o">=</span> <span class="n">BERT</span><span class="p">()</span>
+<span class="k">else</span><span class="p">:</span>
+    <span class="n">model</span> <span class="o">=</span> <span class="n">CoolerNotBERT</span><span class="p">()</span>
+
+<span class="n">trainer</span> <span class="o">=</span> <span class="n">Trainer</span><span class="p">(</span><span class="n">gpus</span><span class="o">=</span><span class="mi">4</span><span class="p">,</span> <span class="n">use_amp</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
+<span class="n">trainer</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">model</span><span class="p">)</span>
+</pre></div>
+</td></tr></table>
+
+<p>Notice a few things about this flow: <br />
+1. You're writing pure PyTorch... no unnecessary abstractions or new libraries to learn. <br />
+2. You get free GPU and 16-bit support without writing any of that code in your model. <br />
+3. You also get all of the capabilities below (without coding or testing yourself).     </p>
+<hr />
+<h6 id="templates">Templates</h6>
+<ol>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#minimal-example">MNIST LightningModule</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/">Trainer</a><ul>
+<li><a href="https://github.com/williamFalcon/pytorch-lightning/tree/master/pl_examples/basic_examples">Basic CPU, GPU Trainer Template</a></li>
+<li><a href="https://github.com/williamFalcon/pytorch-lightning/tree/master/pl_examples/multi_node_examples">GPU cluster Trainer Template</a></li>
+</ul>
+</li>
+</ol>
+<h6 id="docs-shortcuts">Docs shortcuts</h6>
+<ul>
+<li><a href="LightningModule/RequiredTrainerInterface/">LightningModule</a>  </li>
+<li><a href="Trainer/">Trainer</a>  </li>
+</ul>
+<h6 id="quick-start-examples">Quick start examples</h6>
+<ul>
+<li><a href="examples/Examples/#cpu-hyperparameter-search">CPU example</a>   </li>
+<li><a href="examples/Examples/#hyperparameter-search-on-a-single-or-multiple-gpus">Hyperparameter search on single GPU</a>    </li>
+<li><a href="examples/Examples/#hyperparameter-search-on-a-single-or-multiple-gpus">Hyperparameter search on multiple GPUs on same node</a>  </li>
+<li><a href="examples/Examples/#Hyperparameter search on a SLURM HPC cluster">Hyperparameter search on a SLURM HPC cluster</a>      </li>
+</ul>
+<h6 id="checkpointing">Checkpointing</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving">Checkpoint callback</a>    </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#model-saving">Model saving</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/methods/#load-from-metrics">Model loading</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Checkpointing/#restoring-training-session">Restoring training session</a></li>
+</ul>
+<h6 id="computing-cluster-slurm">Computing cluster (SLURM)</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#running-grid-search-on-a-cluster">Running grid search on a cluster</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/SLURM%20Managed%20Cluster#walltime-auto-resubmit">Walltime auto-resubmit</a>   </li>
+</ul>
+<h6 id="debugging">Debugging</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#fast-dev-run">Fast dev run</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#inspect-gradient-norms">Inspect gradient norms</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#Log-gpu-usage">Log GPU usage</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#make-model-overfit-on-subset-of-data">Make model overfit on subset of data</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-the-parameter-count-by-layer">Print the parameter count by layer</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/debugging/#print-which-gradients-are-nan">Pring which gradients are nan</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/properties/#example_input_array">Print input and output size of every module in system</a></li>
+</ul>
+<h6 id="distributed-training">Distributed training</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#init_ddp_connection">Implement Your Own Distributed (DDP) training</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#16-bit-mixed-precision">16-bit mixed precision</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-GPU">Multi-GPU</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#Multi-node">Multi-node</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#single-gpu">Single GPU</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Distributed%20training/#self-balancing-architecture">Self-balancing architecture</a></li>
+</ul>
+<h6 id="experiment-logging">Experiment Logging</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#display-metrics-in-progress-bar">Display metrics in progress bar</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#log-metric-row-every-k-batches">Log metric row every k batches</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#process-position">Process position</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#tensorboard-support">Tensorboard support</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#save-a-snapshot-of-all-hyperparameters">Save a snapshot of all hyperparameters</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#snapshot-code-for-a-training-run">Snapshot code for a training run</a> </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Logging/#write-logs-file-to-csv-every-k-batches">Write logs file to csv every k batches</a></li>
+</ul>
+<h6 id="training-loop">Training loop</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#accumulated-gradients">Accumulate gradients</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-training-for-min-or-max-epochs">Force training for min or max epochs</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#early-stopping">Early stopping callback</a>    </li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#force-disable-early-stop">Force disable early stop</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#gradient-clipping">Gradient Clipping</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/">Hooks</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers">Learning rate scheduling</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/LightningModule/RequiredTrainerInterface/#configure_optimizers">Use multiple optimizers (like GANs)</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Training%20Loop/#set-how-much-of-the-training-set-to-check">Set how much of the training set to check (1-100%)</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/#optimizer_step">Step optimizers at arbitrary intervals</a></li>
+</ul>
+<h6 id="validation-loop">Validation loop</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#check-validation-every-n-epochs">Check validation every n epochs</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/hooks/">Hooks</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-validation-set-to-check">Set how much of the validation set to check</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-how-much-of-the-test-set-to-check">Set how much of the test set to check</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-validation-check-frequency-within-1-training-epoch">Set validation check frequency within 1 training epoch</a></li>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Validation%20loop/#set-the-number-of-validation-sanity-steps">Set the number of validation sanity steps</a></li>
+</ul>
+<h6 id="testing-loop">Testing loop</h6>
+<ul>
+<li><a href="https://williamfalcon.github.io/pytorch-lightning/Trainer/Testing%20loop/">Run test set</a>  </li>
+</ul>
+                
+                  
+                
+              
+              
+                
+
+
+              
+            </article>
+          </div>
+        </div>
+      </main>
+      
+        
+<footer class="md-footer">
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+</html>

mkdocs.yml

@@ -1,16 +0,0 @@
-site_name: PyTorch lightning Documentation
-theme:
-  name: 'material'
-docs_dir: docs
-repo_name: 'williamFalcon/pytorch-lightning'
-repo_url: https://github.com/williamFalcon/pytorch-lightning
-site_dir: 'site'
-site_description: 'Documentation for PyTorch LightningModule, the researcher version of keras.'
-
-dev_addr: '0.0.0.0:8000'
-#google_analytics: ['UA-aasd', 'sitename']
-
-markdown_extensions:
-  - codehilite:
-      guess_lang: false
-      linenums: true

pyproject.toml

@@ -1,5 +0,0 @@
-[build-system]
-requires = [
-    "setuptools",
-    "wheel",
-]

pytorch_lightning/__init__.py

@@ -1,9 +0,0 @@
-from .models.trainer import Trainer
-from .root_module.root_module import LightningModule
-from .root_module.decorators import data_loader
-
-__all__ = [
-    'Trainer',
-    'LightningModule',
-    'data_loader',
-]

pytorch_lightning/callbacks/__init__.py

@@ -1,7 +0,0 @@
-from .pt_callbacks import EarlyStopping, ModelCheckpoint, GradientAccumulationScheduler
-
-__all__ = [
-    'EarlyStopping',
-    'ModelCheckpoint',
-    'GradientAccumulationScheduler',
-]

pytorch_lightning/callbacks/pt_callbacks.py

@@ -1,296 +0,0 @@
-import os
-import shutil
-import warnings
-
-import numpy as np
-
-from pytorch_lightning.pt_overrides.override_data_parallel import LightningDistributedDataParallel
-
-
-class Callback(object):
-    """Abstract base class used to build new callbacks.
-    # Properties
-        params: dict. Training parameters
-            (eg. verbosity, batch size, number of epochs...).
-        model: instance of `keras.models.Model`.
-            Reference of the model being trained.
-    The `logs` dictionary that callback methods
-    take as argument will contain keys for quantities relevant to
-    the current batch or epoch.
-    Currently, the `.fit()` method of the `Sequential` model class
-    will include the following quantities in the `logs` that
-    it passes to its callbacks:
-        on_epoch_end: logs include `acc` and `loss`, and
-            optionally include `val_loss`
-            (if validation is enabled in `fit`), and `val_acc`
-            (if validation and accuracy monitoring are enabled).
-        on_batch_begin: logs include `size`,
-            the number of samples in the current batch.
-        on_batch_end: logs include `loss`, and optionally `acc`
-            (if accuracy monitoring is enabled).
-    """
-
-    def __init__(self):
-        self.validation_data = None
-        self.model = None
-
-    def set_params(self, params):
-        self.params = params
-
-    def set_model(self, model):
-        if type(model) is LightningDistributedDataParallel:
-            model = model.module
-        self.model = model
-
-    def on_epoch_begin(self, epoch, logs=None):
-        pass
-
-    def on_epoch_end(self, epoch, logs=None):
-        pass
-
-    def on_batch_begin(self, batch, logs=None):
-        pass
-
-    def on_batch_end(self, batch, logs=None):
-        pass
-
-    def on_train_begin(self, logs=None):
-        pass
-
-    def on_train_end(self, logs=None):
-        pass
-
-
-class EarlyStopping(Callback):
-    """Stop training when a monitored quantity has stopped improving.
-    # Arguments
-        monitor: quantity to be monitored.
-        min_delta: minimum change in the monitored quantity
-            to qualify as an improvement, i.e. an absolute
-            change of less than min_delta, will count as no
-            improvement.
-        patience: number of epochs with no improvement
-            after which training will be stopped.
-        verbose: verbosity mode.
-        mode: one of {auto, min, max}. In `min` mode,
-            training will stop when the quantity
-            monitored has stopped decreasing; in `max`
-            mode it will stop when the quantity
-            monitored has stopped increasing; in `auto`
-            mode, the direction is automatically inferred
-            from the name of the monitored quantity.
-    """
-
-    def __init__(self, monitor='val_loss',
-                 min_delta=0.0, patience=0, verbose=0, mode='auto'):
-        super(EarlyStopping, self).__init__()
-
-        self.monitor = monitor
-        self.patience = patience
-        self.verbose = verbose
-        self.min_delta = min_delta
-        self.wait = 0
-        self.stopped_epoch = 0
-
-        if mode not in ['auto', 'min', 'max']:
-            print('EarlyStopping mode %s is unknown, fallback to auto mode.' % mode)
-            mode = 'auto'
-
-        if mode == 'min':
-            self.monitor_op = np.less
-        elif mode == 'max':
-            self.monitor_op = np.greater
-        else:
-            if 'acc' in self.monitor:
-                self.monitor_op = np.greater
-            else:
-                self.monitor_op = np.less
-
-        if self.monitor_op == np.greater:
-            self.min_delta *= 1
-        else:
-            self.min_delta *= -1
-
-        self.on_train_begin()
-
-    def on_train_begin(self, logs=None):
-        # Allow instances to be re-used
-        self.wait = 0
-        self.stopped_epoch = 0
-        self.best = np.Inf if self.monitor_op == np.less else -np.Inf
-
-    def on_epoch_end(self, epoch, logs=None):
-        current = logs.get(self.monitor)
-        stop_training = False
-        if current is None:
-            print('Early stopping conditioned on metric `%s` '
-                  'which is not available. Available metrics are: %s' %
-                  (self.monitor, ','.join(list(logs.keys()))), RuntimeWarning)
-            exit(-1)
-
-        if self.monitor_op(current - self.min_delta, self.best):
-            self.best = current
-            self.wait = 0
-        else:
-            self.wait += 1
-            if self.wait >= self.patience:
-                self.stopped_epoch = epoch
-                stop_training = True
-                self.on_train_end()
-
-        return stop_training
-
-    def on_train_end(self, logs=None):
-        if self.stopped_epoch > 0 and self.verbose > 0:
-            print('Epoch %05d: early stopping' % (self.stopped_epoch + 1))
-
-
-class ModelCheckpoint(Callback):
-    """Save the model after every epoch.
-    `filepath` can contain named formatting options,
-    which will be filled the value of `epoch` and
-    keys in `logs` (passed in `on_epoch_end`).
-    For example: if `filepath` is `weights.{epoch:02d}-{val_loss:.2f}.hdf5`,
-    then the model checkpoints will be saved with the epoch number and
-    the validation loss in the filename.
-    # Arguments
-        filepath: string, path to save the model file.
-        monitor: quantity to monitor.
-        verbose: verbosity mode, 0 or 1.
-        save_best_only: if `save_best_only=True`,
-            the latest best model according to
-            the quantity monitored will not be overwritten.
-        mode: one of {auto, min, max}.
-            If `save_best_only=True`, the decision
-            to overwrite the current save file is made
-            based on either the maximization or the
-            minimization of the monitored quantity. For `val_acc`,
-            this should be `max`, for `val_loss` this should
-            be `min`, etc. In `auto` mode, the direction is
-            automatically inferred from the name of the monitored quantity.
-        save_weights_only: if True, then only the model's weights will be
-            saved (`model.save_weights(filepath)`), else the full model
-            is saved (`model.save(filepath)`).
-        period: Interval (number of epochs) between checkpoints.
-    """
-
-    def __init__(self, filepath, monitor='val_loss', verbose=0,
-                 save_best_only=False, save_weights_only=False,
-                 mode='auto', period=1, prefix=''):
-        super(ModelCheckpoint, self).__init__()
-        self.monitor = monitor
-        self.verbose = verbose
-        self.filepath = filepath
-        self.save_best_only = save_best_only
-        self.save_weights_only = save_weights_only
-        self.period = period
-        self.epochs_since_last_save = 0
-        self.prefix = prefix
-
-        if mode not in ['auto', 'min', 'max']:
-            print('ModelCheckpoint mode %s is unknown, '
-                  'fallback to auto mode.' % (mode), RuntimeWarning)
-            mode = 'auto'
-
-        if mode == 'min':
-            self.monitor_op = np.less
-            self.best = np.Inf
-        elif mode == 'max':
-            self.monitor_op = np.greater
-            self.best = -np.Inf
-        else:
-            if 'acc' in self.monitor or self.monitor.startswith('fmeasure'):
-                self.monitor_op = np.greater
-                self.best = -np.Inf
-            else:
-                self.monitor_op = np.less
-                self.best = np.Inf
-
-    def save_model(self, filepath, overwrite):
-        dirpath = '/'.join(filepath.split('/')[:-1])
-
-        # make paths
-        os.makedirs(os.path.dirname(filepath), exist_ok=True)
-
-        if overwrite:
-            for filename in os.listdir(dirpath):
-                if self.prefix in filename:
-                    path_to_delete = os.path.join(dirpath, filename)
-                    try:
-                        shutil.rmtree(path_to_delete)
-                    except OSError:
-                        os.remove(path_to_delete)
-
-        # delegate the saving to the model
-        self.save_function(filepath)
-
-    def on_epoch_end(self, epoch, logs=None):
-        logs = logs or {}
-        self.epochs_since_last_save += 1
-        if self.epochs_since_last_save >= self.period:
-            self.epochs_since_last_save = 0
-            filepath = '{}/{}_ckpt_epoch_{}.ckpt'.format(self.filepath, self.prefix, epoch + 1)
-            if self.save_best_only:
-                current = logs.get(self.monitor)
-                if current is None:
-                    print('Can save best model only with %s available,'
-                          ' skipping.' % (self.monitor), RuntimeWarning)
-                else:
-                    if self.monitor_op(current, self.best):
-                        if self.verbose > 0:
-                            print('\nEpoch %05d: %s improved from %0.5f to %0.5f,'
-                                  ' saving model to %s'
-                                  % (epoch + 1, self.monitor, self.best,
-                                     current, filepath))
-                        self.best = current
-                        self.save_model(filepath, overwrite=True)
-
-                    else:
-                        if self.verbose > 0:
-                            print('\nEpoch %05d: %s did not improve' %
-                                  (epoch + 1, self.monitor))
-            else:
-                if self.verbose > 0:
-                    print('\nEpoch %05d: saving model to %s' % (epoch + 1, filepath))
-                self.save_model(filepath, overwrite=False)
-
-
-class GradientAccumulationScheduler(Callback):
-    """Change gradient accumulation factor according to scheduling.
-    # Arguments
-        scheduling: dict, scheduling in format {epoch: accumulation_factor}
-    """
-    def __init__(self, scheduling: dict):
-        if scheduling == {}:  # empty dict error
-            raise TypeError("Empty dict cannot be interpreted correct")
-
-        for key in scheduling.keys():
-            if not isinstance(key, int) or not isinstance(scheduling[key], int):
-                raise TypeError("All epoches and accumulation factor must be integers")
-
-        minimal_epoch = min(scheduling.keys())
-        if minimal_epoch < 1:
-            msg = f"Epochs indexing from 1, epoch {minimal_epoch} cannot be interpreted correct"
-            raise IndexError(msg)
-        elif minimal_epoch != 1:  # if user didnt define first epoch accumulation factor
-            scheduling.update({1: 1})
-
-        self.scheduling = scheduling
-        self.epochs = sorted(scheduling.keys())
-
-    def on_epoch_begin(self, epoch, trainer):
-        epoch += 1  # indexing epochs from 1
-        for i in reversed(range(len(self.epochs))):
-            if epoch >= self.epochs[i]:
-                trainer.accumulate_grad_batches = self.scheduling.get(self.epochs[i])
-                break
-
-
-if __name__ == '__main__':
-    c = EarlyStopping(min_delta=0.9, patience=2, verbose=True)
-    losses = [10, 9, 8, 8, 6, 4.3, 5, 4.4, 2.8, 2.5]
-    for i, loss in enumerate(losses):
-        should_stop = c.on_epoch_end(i, logs={'val_loss': loss})
-        print(loss)
-        if should_stop:
-            break