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separate solver code from test specific code
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#!/usr/bin/python | import random | ||
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import random | def mutate(parent, geneSet): | ||
import datetime | geneIndex = random.randint(0, len(geneSet) -1); | ||
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index = random.randint(0, len(parent) - 1) | ||
def getFitness(candidate, target): | genes = list(parent) | ||
fitness = 0 | genes[index] = geneSet[geneIndex] | ||
for i in range(0, len(candidate)): | |||
if target[i] == candidate[i]: | |||
fitness += 1 | |||
return(fitness) | |||
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def mutate(candidate): | |||
geneIndex = random.randint(0, len(geneset) -1); | |||
index = random.randint(0, len(candidate) - 1) | |||
genes = list(candidate) | |||
genes[index] = geneset[geneIndex] | |||
return(''.join(genes)) | return(''.join(genes)) | ||
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def generateParent(length): | def generateParent(length, geneSet): | ||
genes = list("") | genes = list("") | ||
for i in range(0,length): | for i in range(0,length): | ||
geneIndex = random.randint(0, len(geneset) -1); | geneIndex = random.randint(0, len(geneSet) -1); | ||
genes.append(geneset[geneIndex]) | genes.append(geneSet[geneIndex]) | ||
return(''.join(genes)) | return(''.join(genes)) | ||
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def display(candidate, startTime): | def getBest(get_fitness, display, targetLen, geneSet): | ||
timeDiff = datetime.datetime.now() - startTime | random.seed() | ||
fitness = getFitness(candidate, target) | bestParent = generateParent(targetLen, geneSet) | ||
print ("%s\t%i\t%s" % (candidate, fitness, str(timeDiff))) | bestFitness = get_fitness(bestParent) | ||
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display(bestParent) | ||
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geneset = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!." | while bestFitness < len(bestParent): | ||
target = "Not all those who wander are lost." | child = mutate(bestParent, geneSet) | ||
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childFitness = get_fitness(child) | ||
random.seed() |
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startTime = datetime.datetime.now() | if childFitness > bestFitness: | ||
bestParent = generateParent(len(target)) | bestFitness = childFitness | ||
bestFitness = getFitness(bestParent, target) | bestParent = child | ||
display(bestParent, startTime) | display(bestParent) | ||
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return bestParent | ||
while bestFitness < len(bestParent): | |||
child = mutate(bestParent) | |||
childFitness = getFitness(child, target) | |||
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if childFitness > bestFitness: | |||
bestFitness = childFitness | |||
bestParent = child | |||
display(bestParent, startTime) |
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import datetime | |||
import genetic | |||
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def getFitness(candidate, target): | |||
fitness = 0 | |||
for i in range(0, len(candidate)): | |||
if target[i] == candidate[i]: | |||
fitness += 1 | |||
return(fitness) | |||
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def display(candidate, target, startTime): | |||
timeDiff = datetime.datetime.now() - startTime | |||
fitness = getFitness(candidate, target) | |||
print ("%s\t%i\t%s" % (candidate, fitness, str(timeDiff))) | |||
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def test_string_duplication(): | |||
geneset = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!." | |||
startTime = datetime.datetime.now() | |||
target = "Not all those who wander are lost." | |||
fnDisplay = lambda candidate: display(candidate, target, startTime) | |||
fnGetFitness = lambda candidate: getFitness(candidate, target) | |||
best = genetic.getBest(fnGetFitness, fnDisplay, len(target), geneset) | |||
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if __name__ == '__main__': | |||
test_string_duplication() |