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27 lines
852 B
27 lines
852 B
6 years ago
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class ComparableMixin(object):
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def _compare(self, other, method):
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try:
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return method(self._cmpkey(), other._cmpkey())
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except (AttributeError, TypeError):
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# _cmpkey not implemented, or return different type,
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# so I can't compare with "other".
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return NotImplemented
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def __lt__(self, other):
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return self._compare(other, lambda s, o: s < o)
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def __le__(self, other):
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return self._compare(other, lambda s, o: s <= o)
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def __eq__(self, other):
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return self._compare(other, lambda s, o: s == o)
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def __ge__(self, other):
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return self._compare(other, lambda s, o: s >= o)
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def __gt__(self, other):
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return self._compare(other, lambda s, o: s > o)
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def __ne__(self, other):
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return self._compare(other, lambda s, o: s != o)
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