Last change
on this file was
1185,
checked in by Maciej Komosinski, 22 months ago
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Renamed a module; new name is "evolalg_steps"
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File size:
752 bytes
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Line | |
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1 | from evolalg_steps.selection.selection import Selection |
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2 | from deap import tools |
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3 | import copy |
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4 | |
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5 | |
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6 | class NSGA2Selection(Selection): |
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7 | def __init__(self, copy=False, *args, **kwargs): |
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8 | super(NSGA2Selection, self).__init__(*args, **kwargs, copy=copy) |
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9 | |
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10 | def call(self, population, count=None): |
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11 | super(NSGA2Selection, self).call(population) |
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12 | pop = tools.selNSGA2(population, len(population)) |
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13 | # make count divisible by 4, required by deap.tools.selTournamentDCD() |
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14 | remainder=count % 4 |
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15 | if remainder > 0: |
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16 | count += 4-remainder |
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17 | return copy.deepcopy(tools.selTournamentDCD(pop, count)) # "The individuals sequence length has to be a multiple of 4 only if k is equal to the length of individuals" |
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