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22 lines
610 B
Python
22 lines
610 B
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from functools import update_wrapper
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class lazy_property:
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"""
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Decorator that replaces a function with the value
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it calculates on the first call.
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"""
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def __init__(self, func):
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self.func = func
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update_wrapper(self, func)
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def __get__(self, instance, owner):
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if instance is None:
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return self # avoids potential __new__ TypeError
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value = self.func(instance)
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setattr(instance, self.func.__name__, value)
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return value
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