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26 lines
669 B
Python
26 lines
669 B
Python
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#This is prone to strange side effects and race conditions.
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class MutatingDescriptor(object):
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def __init__(self, func):
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self.my_func = func
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def __get__(self, obj, obj_type):
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#Modified state is visible to all instances.
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self.my_obj = obj # $ Alert
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return self
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def __call__(self, *args):
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return self.my_func(self.my_obj, *args)
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#Not call from __get__, __set__ or __delete__
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def ok(self, func):
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self.my_func = func
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def __set__(self, obj, value):
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self.not_ok(value)
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def not_ok(self, value):
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#Modified state is visible to all instances.
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self.my_obj = value # $ Alert
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