wpj
30 lines
485 B
Python
30 lines
485 B
Python
class Borg:
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def __new__(cls):
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if not hasattr(cls, '_state'):
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cls._state = {}
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instance = super(Borg, cls).__new__(cls)
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instance.__dict__ = cls._state
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return instance
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class SubBorg(Borg):
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pass
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class SubBorg2(Borg):
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pass
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def main():
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a = SubBorg()
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b = SubBorg()
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c = SubBorg2()
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a.attr = 10
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assert hasattr(b, 'attr') and b.attr == 10
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assert not hasattr(c, 'attr')
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if __name__ == '__main__':
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main()
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