/ Published in: Python
Meta Class that can be used for simplifying rich comparison in Python
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class RichComparisonMixin(object): def __eq__(self, other): raise NotImplementedError("Equality not implemented") def __lt__(self, other): raise NotImplementedError("Less than not implemented") def __ne__(self, other): return not self.__eq__(other) def __gt__(self, other): return not (self.__lt__(other) or self.__eq__(other)) def __le__(self, other): return self.__eq__(other) or self.__lt__(other) def __ge__(self, other): return self.__eq__(other) or self.__gt__(other)
URL: http://www.voidspace.org.uk/python/articles/comparison.shtml