[issue17327] Add PyDict_GetItemSetDefault() as C-API for dict.setdefault()

[Stefan Behnel]

Stefan Behnel added the comment:

To me, PyDict_SetDefault() sounds like it's supposed to set a default value that PyDict_GetItem() would return instead of NULL on lookup failure. Basically a defaultdict-like extension to normal dicts.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17327>
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