Changed example
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@ -11,7 +11,7 @@ from initialization.random_initialization import random_initialization
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class GA:
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class GA:
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def __init__(self):
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def __init__(self):
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"""Initialize the GA."""
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"""Initialize the GA."""
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# Default variables
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# Default variables
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self.chromosome_impl = None
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self.chromosome_impl = None
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self.gene_impl = None
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self.gene_impl = None
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@ -21,7 +21,7 @@ class GA:
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self.chromosome_length = 3
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self.chromosome_length = 3
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self.population_size = 5
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self.population_size = 5
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self.mutation_rate = 0.03
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self.mutation_rate = 0.03
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# Defualt EastGA implimentation structure
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# Defualt EastGA implimentation structure
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self.initialization_impl = random_initialization
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self.initialization_impl = random_initialization
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self.update_fitness = True
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self.update_fitness = True
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@ -38,18 +38,18 @@ class GA:
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self.chromosome_length,
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self.chromosome_length,
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self.chromosome_impl,
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self.chromosome_impl,
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self.gene_impl)
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self.gene_impl)
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def fitness_impl(self, chromosome):
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def fitness_impl(self, chromosome):
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"""Returns the fitness of a chromosome"""
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"""Returns the fitness of a chromosome"""
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pass
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pass
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def evolve(self):
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def evolve(self):
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"""Runs the ga until the ga is no longer active."""
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"""Runs the ga until the ga is no longer active."""
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# run one iteration while the ga is active
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# run one iteration while the ga is active
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while self.active():
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while self.active():
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self.evolve_generation(1)
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self.evolve_generation(1)
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def active(self):
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def active(self):
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"""Returns if the ga should terminate or not"""
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"""Returns if the ga should terminate or not"""
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return self.current_generation < self.generations
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return self.current_generation < self.generations
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@ -58,17 +58,17 @@ class GA:
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"""Evolves the ga the specified number of generations.
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"""Evolves the ga the specified number of generations.
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If update_fitness is set then all fitness values are updated.
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If update_fitness is set then all fitness values are updated.
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Otherwise only fitness values set to None (i.e. uninitialized fitness values) are updated."""
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Otherwise only fitness values set to None (i.e. uninitialized fitness values) are updated."""
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# run the specified number of times
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# run the specified number of times
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for n in range(number_of_generations):
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for n in range(number_of_generations):
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# for each chromosome in the population
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# for each chromosome in the population
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for chromosome in self.population.get_all_chromosomes():
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for chromosome in self.population.get_all_chromosomes():
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# if the fitness should be updated, update it
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# if the fitness should be updated, update it
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if self.update_fitness or chromosome.get_fitness() is None:
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if self.update_fitness or chromosome.get_fitness() is None:
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chromosome.set_fitness(self.fitness_impl(chromosome))
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chromosome.set_fitness(self.fitness_impl(chromosome))
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# apply selection, crossover, and mutation
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# apply selection, crossover, and mutation
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def make_gene(self,value):
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def make_gene(self,value):
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@ -3,9 +3,12 @@ import random
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# Create the Genetic algorithm
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# Create the Genetic algorithm
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ga = EasyGA.GA()
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ga = EasyGA.GA()
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ga.chromosome_length = 3
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def user_gene_domain(gene_index):
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def user_gene_domain(gene_index):
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"""Each gene index is assosiated to its index in the chromosome"""
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"""Each gene index is assosiated to its index in the chromosome"""
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chromosome = [
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chromosome = [
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# Gene instructions set here
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random.randrange(1,100),
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random.randrange(1,100),
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random.uniform(10,5),
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random.uniform(10,5),
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random.choice(["up","down"])
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random.choice(["up","down"])
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