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Rich Comparison Class

/ Published in: Python
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Meta Class that can be used for simplifying rich comparison in Python

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  1. class RichComparisonMixin(object):
  2.  
  3.     def __eq__(self, other):
  4.         raise NotImplementedError("Equality not implemented")
  5.  
  6.     def __lt__(self, other):
  7.         raise NotImplementedError("Less than not implemented")
  8.  
  9.     def __ne__(self, other):
  10.         return not self.__eq__(other)
  11.  
  12.     def __gt__(self, other):
  13.         return not (self.__lt__(other) or self.__eq__(other))
  14.  
  15.     def __le__(self, other):
  16.         return self.__eq__(other) or self.__lt__(other)
  17.  
  18.     def __ge__(self, other):
  19.         return self.__eq__(other) or self.__gt__(other)

URL: http://www.voidspace.org.uk/python/articles/comparison.shtml

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