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Last change
on this file since 1185 was
1185,
checked in by Maciej Komosinski, 18 months ago
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Renamed a module; new name is "evolalg_steps"
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File size:
1.1 KB
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| Line | |
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| 1 | from collections import Iterable |
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| 2 | |
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| 3 | from evolalg_steps.base.step import Step |
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| 4 | import copy |
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| 5 | |
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| 6 | from evolalg_steps.base.union_step import UnionStep |
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| 7 | |
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| 8 | |
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| 9 | class StableGeneration(Step): |
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| 10 | |
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| 11 | def __init__(self, selection, steps, population_size=None): |
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| 12 | self.selection = selection |
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| 13 | self.steps = UnionStep(steps) |
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| 14 | self.population_size = population_size |
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| 15 | |
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| 16 | def generate_new(self, population, missing_count): |
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| 17 | selected = self.selection(population, missing_count) |
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| 18 | selected = copy.deepcopy(selected) |
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| 19 | selected = self.steps(selected) |
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| 20 | return selected |
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| 21 | |
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| 22 | def init(self): |
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| 23 | self.selection.init() |
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| 24 | self.steps.init() |
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| 25 | |
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| 26 | def call(self, population): |
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| 27 | population_size = self.population_size |
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| 28 | if population_size is None: |
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| 29 | population_size = len(population) |
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| 30 | generated = [] |
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| 31 | while len(generated) < population_size: |
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| 32 | gen = self.generate_new(population, population_size - len(generated)) |
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| 33 | if isinstance(gen, Iterable): |
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| 34 | generated.extend(gen) |
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| 35 | else: |
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| 36 | generated.append(gen) |
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| 37 | return generated[:len(population)] |
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