[issue16991] Add OrderedDict written in C

[Roundup Robot]

Roundup Robot added the comment:

New changeset 030205f1e716 by Eric Snow in branch '3.5':
Issue #16991: Fix a few leaks and other memory-related concerns in OrderedDict.
https://hg.python.org/cpython/rev/030205f1e716

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16991>
_______________________________________