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153 lines
4.2 KiB
Python
153 lines
4.2 KiB
Python
from soil import FSM, state, default_state, BaseAgent, NetworkAgent, Environment, Simulation
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from enum import Enum
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from collections import Counter
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import logging
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import math
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from rabbits_basic_sim import RabbitEnv
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class RabbitsImprovedEnv(RabbitEnv):
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def init(self):
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"""Initialize the environment with the new versions of the agents"""
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a1 = self.add_node(Male)
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a2 = self.add_node(Female)
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a1.add_edge(a2)
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self.add_agent(RandomAccident)
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class Rabbit(FSM, NetworkAgent):
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sexual_maturity = 30
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life_expectancy = 300
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birth = None
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@property
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def age(self):
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if self.birth is None:
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return None
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return self.now - self.birth
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@default_state
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@state
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def newborn(self):
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self.info("I am a newborn.")
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self.birth = self.now
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self.offspring = 0
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return self.youngling.delay(self.sexual_maturity - self.age)
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@state
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def youngling(self):
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if self.age >= self.sexual_maturity:
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self.info(f"I am fertile! My age is {self.age}")
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return self.fertile
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@state
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def fertile(self):
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raise Exception("Each subclass should define its fertile state")
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@state
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def dead(self):
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self.die()
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class Male(Rabbit):
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max_females = 5
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mating_prob = 0.001
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@state
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def fertile(self):
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if self.age > self.life_expectancy:
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return self.dead
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# Males try to mate
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for f in self.model.agents(
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agent_class=Female, state_id=Female.fertile.id, limit=self.max_females
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):
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self.debug("FOUND A FEMALE: ", repr(f), self.mating_prob)
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if self.prob(self["mating_prob"]):
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f.impregnate(self)
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break # Do not try to impregnate other females
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class Female(Rabbit):
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gestation = 10
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conception = None
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@state
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def fertile(self):
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# Just wait for a Male
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if self.age > self.life_expectancy:
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return self.dead
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if self.conception is not None:
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return self.pregnant
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@property
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def pregnancy(self):
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if self.conception is None:
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return None
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return self.now - self.conception
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def impregnate(self, male):
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self.info(f"impregnated by {repr(male)}")
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self.mate = male
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self.conception = self.now
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self.number_of_babies = int(8 + 4 * self.random.random())
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@state
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def pregnant(self):
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self.debug("I am pregnant")
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if self.age > self.life_expectancy:
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self.info("Dying before giving birth")
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return self.die()
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if self.pregnancy >= self.gestation:
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self.info("Having {} babies".format(self.number_of_babies))
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for i in range(self.number_of_babies):
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state = {}
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agent_class = self.random.choice([Male, Female])
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child = self.model.add_node(agent_class=agent_class, **state)
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child.add_edge(self)
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if self.mate:
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child.add_edge(self.mate)
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self.mate.offspring += 1
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else:
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self.debug("The father has passed away")
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self.offspring += 1
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self.mate = None
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return self.fertile
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def die(self):
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if self.pregnancy is not None:
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self.info("A mother has died carrying a baby!!")
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return super().die()
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class RandomAccident(BaseAgent):
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def step(self):
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rabbits_alive = self.model.G.number_of_nodes()
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if not rabbits_alive:
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return self.die()
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prob_death = self.model.get("prob_death", 1e-100) * math.floor(
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math.log10(max(1, rabbits_alive))
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)
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self.debug("Killing some rabbits with prob={}!".format(prob_death))
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for i in self.iter_agents(agent_class=Rabbit):
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if i.state_id == i.dead.id:
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continue
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if self.prob(prob_death):
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self.info("I killed a rabbit: {}".format(i.id))
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rabbits_alive -= 1
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i.die()
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self.debug("Rabbits alive: {}".format(rabbits_alive))
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sim = Simulation(model=RabbitsImprovedEnv, max_time=100, seed="MySeed", iterations=1)
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if __name__ == "__main__":
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sim.run()
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