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Added function decorators

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SimpleArt
2020-11-19 20:47:10 -05:00
parent 2c46e32782
commit d90618a614
1 changed files with 11 additions and 20 deletions
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31
src/survivor_selection/survivor_selection_methods.py
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@ -3,41 +3,32 @@ import random
class Survivor_Selection:
"""Survivor selection determines which individuals should be brought to the next generation"""
def __append_to_next_population(survivor_method):
return lambda ga: ga.population.append_children(survivor_method(ga))
@__append_to_next_population
def fill_in_best(ga):
"""Fills in the next population with the best chromosomes from the last population"""
needed_amount = len(ga.population) - ga.population.total_children
ga.population.append_children(
ga.population[:needed_amount]
)
return ga.population[:needed_amount]
@__append_to_next_population
def fill_in_random(ga):
"""Fills in the next population with random chromosomes from the last population"""
needed_amount = len(ga.population) - ga.population.total_children
ga.population.append_children([ # add in chromosomes
random.choice( # randomly
ga.population # from the population
) #
for n in range(needed_amount)]) # until the next population is full
return [random.choice(ga.population) for n in range(needed_amount)]
@__append_to_next_population
def fill_in_parents_then_random(ga):
"""Fills in the next population with all parents followed by random chromosomes from the last population"""
needed_amount = len(ga.population) - ga.population.total_children
parent_amount = max(len(ga.population.total_parents), needed_amount)
parent_amount = min(ga.population.total_parents, needed_amount)
random_amount = needed_amount - parent_amount
ga.population.append_children( # add in chromosomes
ga.population.get_mating_pool()[:parent_amount] # from the mating pool
) #
ga.population.append_children([ # add in chromosomes
random.choice( # randomly
ga.population # from the population
) #
for n in range(random_amount)]) # until the next population is full
return ga.population.get_mating_pool()[:parent_amount] + [random.choice(ga.population) for n in range(random_amount)]