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27 lines
384 B
27 lines
384 B
x = 1
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print(+x)
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print(-x)
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print(~x)
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print(not None)
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print(not False)
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print(not True)
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print(not 0)
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print(not 1)
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print(not -1)
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print(not ())
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print(not (1,))
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print(not [])
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print(not [1,])
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print(not {})
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print(not {1:1})
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# check user instance
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class A: pass
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print(not A())
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# check user instances derived from builtins
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class B(int): pass
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print(not B())
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class C(list): pass
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print(not C())
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