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Filename : _structures.py
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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function


class Infinity(object):
    def __repr__(self):
        return "Infinity"

    def __hash__(self):
        return hash(repr(self))

    def __lt__(self, other):
        return False

    def __le__(self, other):
        return False

    def __eq__(self, other):
        return isinstance(other, self.__class__)

    def __ne__(self, other):
        return not isinstance(other, self.__class__)

    def __gt__(self, other):
        return True

    def __ge__(self, other):
        return True

    def __neg__(self):
        return NegativeInfinity


Infinity = Infinity()


class NegativeInfinity(object):
    def __repr__(self):
        return "-Infinity"

    def __hash__(self):
        return hash(repr(self))

    def __lt__(self, other):
        return True

    def __le__(self, other):
        return True

    def __eq__(self, other):
        return isinstance(other, self.__class__)

    def __ne__(self, other):
        return not isinstance(other, self.__class__)

    def __gt__(self, other):
        return False

    def __ge__(self, other):
        return False

    def __neg__(self):
        return Infinity


NegativeInfinity = NegativeInfinity()