# Copyright 2008-2015 Nokia Networks
# Copyright 2016- Robot Framework Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from operator import eq, lt, le, gt, ge
from .robottypes import type_name
[docs]class Sortable(object):
"""Base class for sorting based self._sort_key"""
_sort_key = NotImplemented
def __test(self, operator, other, require_sortable=True):
if isinstance(other, Sortable):
return operator(self._sort_key, other._sort_key)
if not require_sortable:
return False
raise TypeError("Cannot sort '%s' and '%s'."
% (type_name(self), type_name(other)))
def __eq__(self, other):
return self.__test(eq, other, require_sortable=False)
def __ne__(self, other):
return not self == other
def __lt__(self, other):
return self.__test(lt, other)
def __le__(self, other):
return self.__test(le, other)
def __gt__(self, other):
return self.__test(gt, other)
def __ge__(self, other):
return self.__test(ge, other)
def __hash__(self):
return hash(self._sort_key)