[New-bugs-announce] [issue38290] cleanup ababstractproperty in typing.py

[hongweipeng]

New submission from hongweipeng <hongweichen8888 at sina.com>:

`abc.ababstractproperty` was deprecated since version 3.3. https://docs.python.org/3/library/abc.html#abc.abstractproperty

I checked the code and found that only `typing.py` is still used. I created a PR and replaced it with the one written in the documentation.

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components: Library (Lib)
messages: 353348
nosy: hongweipeng
priority: normal
severity: normal
status: open
title: cleanup ababstractproperty in typing.py
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38290>
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