set auto dp if no backend

pytorch_lightning/logging/wandb.py

@@ -1,27 +1,3 @@
-"""
-Log using `W&B <https://www.wandb.com>`_
-
-.. code-block:: python
-
-    >>> from pytorch_lightning.logging import WandbLogger
-    >>> from pytorch_lightning import Trainer
-    >>> wandb_logger = WandbLogger()
-    >>> trainer = Trainer(logger=wandb_logger)
-
-
-Use the logger anywhere in you LightningModule as follows:
-
-.. code-block:: python
-
-    def train_step(...):
-        # example
-        self.logger.experiment.whatever_wandb_supports(...)
-
-    def any_lightning_module_function_or_hook(...):
-        self.logger.experiment.whatever_wandb_supports(...)
-
-"""
-
 import os
 
 try:
@@ -44,6 +20,16 @@ class WandbLogger(LightningLoggerBase):
         anonymous (bool): enables or explicitly disables anonymous logging.
         project (str): the name of the project to which this run will belong.
         tags (list of str): tags associated with this run.
+
+    Example
+    --------
+    .. code-block:: python
+
+        from pytorch_lightning.logging import WandbLogger
+        from pytorch_lightning import Trainer
+
+        wandb_logger = WandbLogger()
+        trainer = Trainer(logger=wandb_logger)
     """
 
     def __init__(self, name=None, save_dir=None, offline=False, id=None, anonymous=False,