[issue11085] expose _abcoll as collections.abc

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

And what about those "collection" ABCs that aren't collections?  These are at least

* Hashable
* Callable
* ByteString
* Iterator

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nosy: +georg.brandl

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11085>
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