prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Optional dependencies are required for deprecated logging module
  🐛 Bug
  
  There is a backwards compatibility issues coming from PR #767. Notably, if a user doesn't have any of the extra logging dependencies then they'll be an import error.
  
  ### To Reproduce
  
  1. Remove all logging dependencies from your environment (E.g. comet)
  2. Depend on the deprecated pytorch_lightning.logging package and run
  
  ### Expected behavior
  
  We expect to maintain backwards compatibility here so optional dependencies shouldn't be required.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `pytorch_lightning/logging/__init__.py`
  Content:
  ```
  1 """
  2 .. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0
  3 """
  4 
  5 import warnings
  6 
  7 warnings.warn("`logging` package has been renamed to `loggers` since v0.6.1"
  8               " and will be removed in v0.8.0", DeprecationWarning)
  9 
  10 from pytorch_lightning.loggers import *  # noqa: F403
  11 from pytorch_lightning.loggers import (  # noqa: E402
  12     base, comet, mlflow, neptune, tensorboard, test_tube, wandb
  13 )
  14
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/pytorch_lightning/logging/__init__.py b/pytorch_lightning/logging/__init__.py
  --- a/pytorch_lightning/logging/__init__.py
  +++ b/pytorch_lightning/logging/__init__.py
  @@ -8,6 +8,3 @@
                 " and will be removed in v0.8.0", DeprecationWarning)
   
   from pytorch_lightning.loggers import *  # noqa: F403
  -from pytorch_lightning.loggers import (  # noqa: E402
  -    base, comet, mlflow, neptune, tensorboard, test_tube, wandb
  -)
  
verification_info: {"golden_diff": "diff --git a/pytorch_lightning/logging/__init__.py b/pytorch_lightning/logging/__init__.py\n--- a/pytorch_lightning/logging/__init__.py\n+++ b/pytorch_lightning/logging/__init__.py\n@@ -8,6 +8,3 @@\n               \" and will be removed in v0.8.0\", DeprecationWarning)\n \n from pytorch_lightning.loggers import *  # noqa: F403\n-from pytorch_lightning.loggers import (  # noqa: E402\n-    base, comet, mlflow, neptune, tensorboard, test_tube, wandb\n-)\n", "issue": "Optional dependencies are required for deprecated logging module\n\ud83d\udc1b Bug\r\n\r\nThere is a backwards compatibility issues coming from PR #767. Notably, if a user doesn't have any of the extra logging dependencies then they'll be an import error.\r\n\r\n### To Reproduce\r\n\r\n1. Remove all logging dependencies from your environment (E.g. comet)\r\n2. Depend on the deprecated pytorch_lightning.logging package and run\r\n\r\n### Expected behavior\r\n\r\nWe expect to maintain backwards compatibility here so optional dependencies shouldn't be required.\n", "before_files": [{"content": "\"\"\"\n.. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0\n\"\"\"\n\nimport warnings\n\nwarnings.warn(\"`logging` package has been renamed to `loggers` since v0.6.1\"\n              \" and will be removed in v0.8.0\", DeprecationWarning)\n\nfrom pytorch_lightning.loggers import *  # noqa: F403\nfrom pytorch_lightning.loggers import (  # noqa: E402\n    base, comet, mlflow, neptune, tensorboard, test_tube, wandb\n)\n", "path": "pytorch_lightning/logging/__init__.py"}], "after_files": [{"content": "\"\"\"\n.. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0\n\"\"\"\n\nimport warnings\n\nwarnings.warn(\"`logging` package has been renamed to `loggers` since v0.6.1\"\n              \" and will be removed in v0.8.0\", DeprecationWarning)\n\nfrom pytorch_lightning.loggers import *  # noqa: F403\n", "path": "pytorch_lightning/logging/__init__.py"}]}