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37 lines
862 B
Python
37 lines
862 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 difference(self):
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if self.initial_value is None:
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initial_value = 0
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else:
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initial_value = self.initial_value
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if self.value is None:
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value = 0
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else:
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value = self.value
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return value - initial_value
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@property
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def delta(self):
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return abs(self.difference)
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def difference_string(self):
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if self.difference > 0:
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return f"+{self.difference}"
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return self.difference
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