[issue41756] Do not always use exceptions to return result from coroutine

[Vladimir Matveev]

Vladimir Matveev <desco.by at gmail.com> added the comment:

I guess `PyIter_Send` would imply that this function should work for all inputs (like in https://bugs.python.org/msg377007) which also sounds reasonable.

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<https://bugs.python.org/issue41756>
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