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23 lines
382 B
23 lines
382 B
# A contains everything
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class A:
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def __contains__(self, key):
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return True
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a = A()
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print(True in a)
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print(1 in a)
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print(() in a)
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# B contains given things
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class B:
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def __init__(self, items):
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self.items = items
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def __contains__(self, key):
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return key in self.items
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b = B([])
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print(1 in b)
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b = B([1, 2])
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print(1 in b)
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print(2 in b)
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print(3 in b)
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