[Python-Dev] Is static typing still optional?

[Barry Warsaw]

On Dec 18, 2017, at 21:41, Chris Barker <chris.barker at noaa.gov> wrote:
> 
> TL;DR:
> My point is that having type annotation syntax required for something in the stdlib is a significant step toward "normalizing" type hinting in Python. Whether that's a good idea or not is a judgement call, but it IS a big step.

This is something we’re discussing for importlib.resources:

https://bugs.python.org/issue32248#msg308495

In the standalone version, we’re using annotations for the Python 3 bits.  It would make our lives easier if we kept them for the stdlib version (applying diffs and keeping them in sync would be easier).  Brett says in the follow up:

"As for the type hints, I thought it was lifted such that new code could include it but we wouldn't be taking PRs to add them to pre-existing code?”

So, what’s the deal?

-Barry

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