第13章 正确重载运算符#

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class Vector(object):
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    def __init__(self, x):
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        self.x = x
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    def __neg__(self):
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        return "Vector(%d)" % (-self.x)
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    def __str__(self):
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        return "Vector(%s)" % (str(self.data))
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    def __iter__(self):
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        return iter(self.data)
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    def __pos__(self):
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        return "Vector(%d)" % (self.x + 1)
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    def __invert__(self):
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        return "Vector(%d)" % (~self.x)
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if __name__ == "__main__":
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    v = Vector(1)
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    print(-v)  # Vector(-1)
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    print(+v)  # Vector(2)
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    print(~v)  # Vector(-2)

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Vector(-1)
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Vector(2)
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Vector(-2)