Source code for surrogate.selection.selWorst
# Copyright 2016 Quan Pan
#
# 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
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# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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# Author: Quan Pan <quanpan302@hotmail.com>
# License: Apache License, Version 2.0
# Create: 2016-12-02
from operator import attrgetter
[docs]def selWorst(individuals, k=1):
"""Select the *k* worst individuals among the input *individuals*. The
list returned contains references to the input *individuals*.
:param individuals: A list of individuals to select from.
:param k: The number of individuals to select.
:returns: A list containing the k worst individuals.
"""
return sorted(individuals, key=attrgetter("fitness"))[:k]