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)

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

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

Rich Comparison Class

Python