[issue10360] _weakrefset.WeakSet.__contains__ should not propagate TypeErrors

[Tres Seaver]

Tres Seaver <tseaver at agendaless.com> added the comment:

WeakKeyDictionary's __contains__:

    def __contains__(self, key):
        try:
            wr = ref(key)
        except TypeError:
            return 0
        return wr in self.data

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10360>
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