[issue42725] PEP 563: Should the behavior change for yield/yield from's

[Guido van Rossum]

Guido van Rossum <guido at python.org> added the comment:

I wouldn’t have thought you’d need a PEP for this but if you want to write one that sounds like the right thing.

Re: async and walrus: I think those are different, their presence doesn’t affect the meaning of the function like yield. We can’t hope to prevent side effects syntactically.

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