[issue40213] contextlib.aclosing()

[John Belmonte]

John Belmonte <john at neggie.net> added the comment:

highlighting from PEP 533:

> Async generators cannot do cleanup at all without some mechanism for deterministic cleanup that people will actually use, and async generators are particularly likely to hold resources like file descriptors.

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<https://bugs.python.org/issue40213>
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