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23 lines
523 B
Python
23 lines
523 B
Python
class Dirty:
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def __init__(self, initial_value):
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self.initial_value = initial_value
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self.value = initial_value
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def is_clean(self):
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return self.initial_value == self.value
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def is_dirty(self):
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return not self.is_clean()
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def __bool__(self):
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return self.is_dirty()
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class DirtyDelta(Dirty):
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@property
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def delta(self):
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return self.value - self.initial_value
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@delta.setter
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def delta(self, value):
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self.value = self.initial_value + value
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