Document exceptions in callbacks

[akihironitta]

What does this PR do?

Part of #5434.

TODO

• base.py
• early_stopping.py
• finetuning.py
• gpu_stats_monitor.py
• gradient_accumulation_scheduler.py
• __init__.py
• lambda_function.py
• lr_monitor.py
• model_checkpoint.py
• progress.py
• pruning.py

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[codecov]

Codecov Report

Merging #5541 (9f43a89) into master (52c07f2) will decrease coverage by 3%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #5541    +/-   ##
=======================================
- Coverage      90%     88%    -3%     
=======================================
  Files         170     170            
  Lines       11807   11650   -157     
=======================================
- Hits        10676   10215   -461     
- Misses       1131    1435   +304     

[carmocca]

You may want to use the issue as a tracker of all the lines and do it on separate PRs. This also allows external contributors

[pep8speaks]

Hello @akihironitta! Thanks for updating this PR.

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-02-15 00:02:26 UTC

[akihironitta]

Would you mind reviewing this PR again?

[tchaton]

Great addition !