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_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 InfinityType(object): def __repr__(self): # type: () -> str return "Infinity" def __hash__(self): # type: () -> int return hash(repr(self)) def __lt__(self, other): # type: (object) -> bool return False def __le__(self, other): # type: (object) -> bool return False def __eq__(self, other): # type: (object) -> bool return isinstance(other, self.__class__) def __ne__(self, other): # type: (object) -> bool return not isinstance(other, self.__class__) def __gt__(self, other): # type: (object) -> bool return True def __ge__(self, other): # type: (object) -> bool return True def __neg__(self): # type: (object) -> NegativeInfinityType return NegativeInfinity Infinity = InfinityType() class NegativeInfinityType(object): def __repr__(self): # type: () -> str return "-Infinity" def __hash__(self): # type: () -> int return hash(repr(self)) def __lt__(self, other): # type: (object) -> bool return True def __le__(self, other): # type: (object) -> bool return True def __eq__(self, other): # type: (object) -> bool return isinstance(other, self.__class__) def __ne__(self, other): # type: (object) -> bool return not isinstance(other, self.__class__) def __gt__(self, other): # type: (object) -> bool return False def __ge__(self, other): # type: (object) -> bool return False def __neg__(self): # type: (object) -> InfinityType return Infinity NegativeInfinity = NegativeInfinityType()