Source code for surrogate.crossover.cxMessyOnePoint
# Copyright 2016 Quan Pan
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# 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
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# 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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# limitations under the License.
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# Author: Quan Pan <quanpan302@hotmail.com>
# License: Apache License, Version 2.0
# Create: 2016-12-02
import random
[docs]def cxMessyOnePoint(var1, var2):
"""Executes a one point crossover on :term:`sequence` individual.
The crossover will in most cases change the individuals size. The two
individuals are modified in place.
:param var1: The first variable participating in the crossover.
:param var2: The second variable participating in the crossover.
:returns: A tuple of two variables.
This function uses the :func:`~random.randint` function from the python base
:mod:`random` module.
"""
cxpoint1 = random.randint(0, len(var1))
cxpoint2 = random.randint(0, len(var2))
# cxpoint1 = random.randint(0, var1.size)
# cxpoint2 = random.randint(0, var2.size)
var1[cxpoint1:], var2[cxpoint2:] = var2[cxpoint2:], var1[cxpoint1:]
# var1[cxpoint1:], var2[cxpoint1:] = var2[cxpoint1:].copy(), var1[cxpoint1:].copy()
return var1, var2