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# test builtin hash function
print(hash(False))
print(hash(True))
print({():1}) # hash tuple
print({(1,):1}) # hash non-empty tuple
print(hash in {hash:1}) # hash function
try:
hash([])
except TypeError:
print("TypeError")
class A:
def __hash__(self):
return 123
def __repr__(self):
return "a instance"
print(hash(A()))
print({A():1})
# all user-classes have default __hash__
class B:
pass
hash(B())
# if __eq__ is defined then default __hash__ is not used
class C:
def __eq__(self, another):
return True
try:
hash(C())
except TypeError:
print("TypeError")
# __hash__ must return an int
class D:
def __hash__(self):
return None
try:
hash(D())
except TypeError:
print("TypeError")
# __hash__ returning a bool should be converted to an int
class E:
def __hash__(self):
return True
print(hash(E()))
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