[raysgd] Cleanup User API (#7384)

* Init fp16

* fp16 and schedulers

* scheduler linking and fp16

* to fp16

* loss scaling and documentation

* more documentation

* add tests, refactor config

* moredocs

* more docs

* fix logo, add test mode, add fp16 flag

* fix tests

* fix scheduler

* fix apex

* improve safety

* fix tests

* fix tests

* remove pin memory default

* rm

* fix

* Update doc/examples/doc_code/raysgd_torch_signatures.py

* fix

* migrate changes from other PR

* ok thanks

* pass

* signatures

* lint'

* Update python/ray/experimental/sgd/pytorch/utils.py

* Apply suggestions from code review

Co-Authored-By: Edward Oakes <ed.nmi.oakes@gmail.com>

* should address most comments

* comments

* fix this ci

* first_pass

* add overrides

* override

* fixing up operators

* format

* sgd

* constants

* rm

* revert

* save

* failures

* fixes

* trainer

* run test

* operator

* code

* op

* ok done

* operator

* sgd test fixes

* ok

* trainer

* format

* Apply suggestions from code review

Co-Authored-By: Edward Oakes <ed.nmi.oakes@gmail.com>

* Update doc/source/raysgd/raysgd_pytorch.rst

* docstring

* dcgan

* doc

* commits

* nit

* testing

* revert

* Start renaming pytorch to torch

* Rename PyTorchTrainer to TorchTrainer

* Rename PyTorch runners to Torch runners

* Finish renaming API

* Rename to torch in tests

* Finish renaming docs + tests

* Run format + fix DeprecationWarning

* fix

* move tests up

* benchmarks

* rename

* remove some args

* better metrics output

* fix up the benchmark

* benchmark-yaml

* horovod-benchmark

* benchmarks

* Remove benchmark code for cleanups

* makedatacreator

* relax

* metrics

* autosetsampler

* profile

* movements

* OK

* smoothen

* fix

* nitdocs

* loss

* comments

* fix

* fix

* runner_tests

* codes

* example

* fix_test

* fix

* tests

Co-authored-by: Edward Oakes <ed.nmi.oakes@gmail.com>
Co-authored-by: Maksim Smolin <maximsmol@gmail.com>

python/ray/autoscaler/updater.py

@@ -2,6 +2,7 @@ try:  # py3
     from shlex import quote
 except ImportError:  # py2
     from pipes import quote
+import click
 import hashlib
 import logging
 import os
@@ -274,7 +275,7 @@ class SSHCommandRunner:
         except subprocess.CalledProcessError:
             if exit_on_fail:
                 quoted_cmd = " ".join(final_cmd[:-1] + [quote(final_cmd[-1])])
-                raise Exception(
+                raise click.ClickException(
                     "Command failed: \n\n  {}\n".format(quoted_cmd))
             else:
                 raise