"""Mutation implementation for binary solution, swap two bits randomly from solution
"""
# main imports
import random
import sys
# module imports
from .Mutation import Mutation
from ...utils.modules import load_class
[docs]class SimpleMutation(Mutation):
"""Mutation implementation for binary solution, swap two bits randomly from solution
Attributes:
kind: {KindOperator} -- specify the kind of operator
"""
[docs] def apply(self, solution):
"""Create new solution based on solution passed as parameter
Args:
solution: {Solution} -- the solution to use for generating new solution
Returns:
{Solution} -- new generated solution
"""
size = solution._size
firstCell = 0
secondCell = 0
# copy data of solution
currentData = solution._data.copy()
while firstCell == secondCell:
firstCell = random.randint(0, size - 1)
secondCell = random.randint(0, size - 1)
temp = currentData[firstCell]
# swicth values
currentData[firstCell] = currentData[secondCell]
currentData[secondCell] = temp
# create solution of same kind with new data
class_name = type(solution).__name__
# dynamically load solution class if unknown
if class_name not in sys.modules:
load_class(class_name, globals())
return getattr(globals()['macop.solutions.' + class_name],
class_name)(currentData, size)