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Issue 2235: __hash__ is once again inherited by default, but inheritance can be blocked explicitly so that collections.Hashable remains meaningful

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Nick Coghlan 2008-07-15 14:27:37 +00:00
parent 9ace15ca25
commit 53663a695e
14 changed files with 134 additions and 134 deletions
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6
Lib/sets.py
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@ -439,10 +439,8 @@ class Set(BaseSet):
def __setstate__(self, data):
self._data, = data
def __hash__(self):
"""A Set cannot be hashed."""
# We inherit object.__hash__, so we must deny this explicitly
raise TypeError, "Can't hash a Set, only an ImmutableSet."
# We inherit object.__hash__, so we must deny this explicitly
__hash__ = None
# In-place union, intersection, differences.
# Subtle: The xyz_update() functions deliberately return None,