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User instances are hashable by default (using __hash__ inherited from "object"). But if __eq__ is defined and __hash__ not defined in particular class, instance is not hashable.
35 lines
517 B
Python
35 lines
517 B
Python
# test builtin hash function
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print(hash(False))
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print(hash(True))
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print({():1}) # hash tuple
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print({1 << 66:1}) # hash big int
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print(hash in {hash:1}) # hash function
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try:
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hash([])
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except TypeError:
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print("TypeError")
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class A:
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def __hash__(self):
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return 123
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def __repr__(self):
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return "a instance"
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print(hash(A()))
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print({A():1})
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class B:
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pass
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hash(B())
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class C:
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def __eq__(self, another):
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return True
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try:
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hash(C())
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except TypeError:
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print("TypeError")
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