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

[Raymond Hettinger]

Raymond Hettinger added the comment:

Christian, go ahead an rearrange the collections module.

Move Lib/collections/abc.py to Lib/_collections_abc.py.

Also, be sure to update source link on line 18 of Doc/library.collections.abc.rst

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assignee: rhettinger -> christian.heimes

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