`warnings.simplefilter('default')` in global scope causes excessive DeprecationWarnings

[jckhan]

TransformerEngine/transformer_engine/common/utils.py

Line 9 in f85553e

warnings.simplefilter('default')

Importing the transformer_engine.common.utils resets the warning filters to default settings using warnings.simplefilter('default') in the global scope. This results in the console being flooded with DeprecationWarnings, which are normally ignored by Python by default.

Would it be possible to move setting the warning filter config to a more controlled scope in this module?

[ptrendx]

Makes sense.

@ksivaman Could you take a look at that?

[ksivaman]

@jckhan Could you confirm if #813 resolves this? Thanks!

[jckhan]

@ksivaman yes I think that works, thank you!

[timmoon10]

What kind of warnings are being reported? I'd like to make sure we're not suppressing anything important.

[jckhan]

DeprecationWarnings, ResourceWarnings, among others. The point here is that these warnings have default handling behavior defined by warnings https://docs.python.org/3/library/warnings.html#warning-categories, which is being overrode silently by importing transformer_engine. The fix suggested above is just restoring the default behavior of warnings globally, not suppressing any warnings that weren't being suppressed in the first place.