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[EDIT] FILE: _structures.py

# 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()

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