[issue18986] Add a case-insensitive case-preserving dict

[Ethan Furman]

Ethan Furman added the comment:

To the point, however, Eric's example would make use of both the defaultdict portion and the transformkey portion in a single dict.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18986>
_______________________________________