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Aug 22nd, 2019
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  1. import random, pprint, time
  2.  
  3. class Creature(object):
  4. def __init__(self, metaB, reproRate, temperatureLimit, infantDeath, ageLimit, geneticStability, breedingAge, age):
  5. self.metaB, self.reproRate, self.temperatureLimit = metaB, reproRate, temperatureLimit
  6. self.infantDeath, self.ageLimit, self.geneticStability, self.breedingAge, self.age = infantDeath, ageLimit, geneticStability, breedingAge, age
  7.  
  8. def mutate(self):
  9. if random.randint(1, 1000) <= self.geneticStability:
  10. attr = random.choice(["metaB", "reproRate", "temperatureLimit", "infantDeath", "ageLimit", "geneticStability", "breedingAge"])
  11. setattr(self, attr, getattr(self, attr) + random.choice([-1, 1]))
  12. self.ageLimit = self.ageLimit or 1
  13.  
  14. def doAge(self):
  15. self.age += 1
  16.  
  17. # Breed with another creature
  18. def breed(self, other):
  19. # Find the minimum, maximum litter size
  20. minimum, maximum = min(self.reproRate, other.reproRate), max(self.reproRate, other.reproRate)
  21. # Determine litter size
  22. litterSize = random.randint(minimum, maximum) if minimum != maximum else minimum
  23. litter = []
  24. for _ in range(litterSize):
  25. # Copy either of the parent's attributes, minus age.
  26. baby = Creature(
  27. random.choice([self.metaB, other.metaB]),
  28. random.choice([self.reproRate, other.reproRate]),
  29. random.choice([self.temperatureLimit, other.temperatureLimit]),
  30. random.choice([self.infantDeath, other.infantDeath]),
  31. random.choice([self.ageLimit, other.ageLimit]),
  32. random.choice([self.geneticStability, other.geneticStability]),
  33. random.choice([self.breedingAge, other.breedingAge]),
  34. 0
  35. )
  36. baby.mutate()
  37. litter.append(baby)
  38. return litter
  39.  
  40.  
  41. # Starting population
  42. population = [Creature(1, 2, 10, 1, 3, 1, 1, 0)] * 10
  43. totalDeaths, totalBirths = 0, 0
  44. start = time.time()
  45.  
  46. # iterate for 100 generations
  47. for generation in range(100):
  48. gen_start = time.time()
  49. breeding_pool = []
  50. deaths, births = 0, 0
  51.  
  52. # Age Limit cull
  53. popBefore = len(population)
  54. population = list(filter(lambda creature : creature.age < creature.ageLimit, population))
  55. popAfter = len(population)
  56. deaths += popBefore - popAfter
  57. totalDeaths += deaths
  58.  
  59. # If breeding age allows breeding
  60. breeding_pool = list(filter(lambda creature : creature.breedingAge >= creature.age, population))
  61.  
  62. # Shuffle breeding pool
  63. random.shuffle(breeding_pool)
  64.  
  65. # If pool count is odd, cull a single creature
  66. if len(breeding_pool) % 2 == 1:
  67. del breeding_pool[0]
  68.  
  69. # Make pairs
  70. center = len(breeding_pool) // 2
  71. pair1, pair2 = breeding_pool[:center], breeding_pool[center:]
  72. pairs = list(zip(pair1, pair2))
  73.  
  74. # Breeding
  75. offspring = []
  76. for parent1, parent2 in pairs:
  77. offspring.extend(parent1.breed(parent2))
  78. births += len(offspring)
  79. totalBirths += births
  80.  
  81. # Age all creatures
  82. [creature.doAge() for creature in population]
  83.  
  84. # Extend population, we're done
  85. population.extend(offspring)
  86. gen_end = time.time()
  87.  
  88. # Print current status
  89. print('-'*45)
  90. print('[{}s] Generation {} finished in {} seconds.'.format(round(gen_end - start, 2), generation, round(gen_end - gen_start, 2)))
  91. print(f"Number of people: {len(population)}\nDeaths: {deaths}\nBirths: {births}")
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