[issue19542] WeakValueDictionary bug in setdefault()&pop()
Tim Peters
report at bugs.python.org
Mon Dec 9 04:55:35 CET 2013
Tim Peters added the comment:
The weakref.slice fix looks solid to me, although it appears to be specific to 2.7 (the methods are fancier on the current default branch, fiddling with self._pending_removals too).
Does anyone know why the signature of pop is:
def pop(self, key, *args)
? It doesn't make sense to me to accept any number of arguments following `key`. Perhaps it's just an obscure way to avoid doing:
_noarg = object() # unique sentinel
def pop(self, key, default=_noarg):
?
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nosy: +tim.peters
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<http://bugs.python.org/issue19542>
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