source: framspy/evolalg/base/random_sequence_index.py

Last change on this file was 1190, checked in by Maciej Komosinski, 2 years ago

Added the "evolalg" module for evolutionary optimization

File size: 592 bytes
Line 
1import numpy as np
2
3
4class RandomIndexSequence:
5    """A helper function for tournament selection. Allows each individual to take part in a tournament,
6    thus reducing the risk of overlooking individuals by not sampling them due to uncontrolled
7    randomness, as can happen in the naive implementation of tournament selection."""
8
9    def __init__(self, popsize):
10        self.popsize: int = popsize
11        self.permut: list = []
12
13    def getNext(self):
14        if len(self.permut) < 1:
15            self.permut = list(np.random.permutation(self.popsize))
16        return self.permut.pop()
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