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13 lines
343 B
13 lines
343 B
5 years ago
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class lazy_property():
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"""Defines a property whose value will be computed only once and as needed.
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This can only be used on instance methods.
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"""
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def __init__(self, func):
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self._func = func
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def __get__(self, obj_self, cls):
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value = self._func(obj_self)
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setattr(obj_self, self._func.__name__, value)
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return value
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