[issue19218] Use of MutableMapping in os module slows down interpreter startup

[STINNER Victor]

STINNER Victor added the comment:

The collections module is loaded by the io module. You removed "from collections.abc import MutableMapping" from os.py. To be useful, you have also to rewrite the whole io module to remove all references to the collections.abc module, right?

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nosy: +haypo

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19218>
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