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Last change
on this file since 1163 was
1139,
checked in by Maciej Komosinski, 4 years ago
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Added --debug mode that prints names of steps; final multiple evaluation now evaluates genotypes in hall of fame instead of the last population
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File size:
653 bytes
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| 1 | from evolalg.base.individual import Individual |
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| 2 | from typing import List |
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| 3 | import random |
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| 4 | |
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| 5 | from evolalg.base.step import Step |
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| 6 | from evolalg.selection.selection import Selection |
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| 7 | |
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| 8 | |
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| 9 | class TournamentSelection(Selection): |
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| 10 | def __init__(self, tournament_size: int, fit_attr="fitness", copy=False, *args, **kwargs): |
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| 11 | super(TournamentSelection, self).__init__(copy, *args, **kwargs) |
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| 12 | self.tournament_size = tournament_size |
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| 13 | self.fit_attr = fit_attr |
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| 14 | |
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| 15 | def select_next(self, population): |
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| 16 | selected = [random.choice(population) for i in range(self.tournament_size)] |
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| 17 | return max(selected, key=lambda x: getattr(x, self.fit_attr)) |
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