[issue2965] Update interface of weakref dictionaries

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

By the way, code like:
         items1 = list(dict.items())
         items1.sort()

could be simplified into:
         items1 = sorted(dict.items())

(same for reversed() instead of list.reverse())

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue2965>
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