14 lines
374 B
Python
14 lines
374 B
Python
# BEGIN MODEL_V4
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class Quantity:
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def __set_name__(self, owner, name): # <1>
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self.storage_name = name # <2>
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def __set__(self, instance, value): # <3>
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if value > 0:
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instance.__dict__[self.storage_name] = value
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else:
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msg = f'{self.storage_name} must be > 0'
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raise ValueError(msg)
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# END MODEL_V4
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