mirror of
https://github.com/gsi-upm/soil
synced 2024-11-22 19:22:29 +00:00
158 lines
4.2 KiB
Python
158 lines
4.2 KiB
Python
from soil import FSM, state, default_state, BaseAgent, NetworkAgent, Environment
|
|
from soil.time import Delta
|
|
from enum import Enum
|
|
from collections import Counter
|
|
import logging
|
|
import math
|
|
|
|
|
|
class RabbitEnv(Environment):
|
|
@property
|
|
def num_rabbits(self):
|
|
return self.count_agents(agent_class=Rabbit)
|
|
|
|
@property
|
|
def num_males(self):
|
|
return self.count_agents(agent_class=Male)
|
|
|
|
@property
|
|
def num_females(self):
|
|
return self.count_agents(agent_class=Female)
|
|
|
|
|
|
class Rabbit(FSM, NetworkAgent):
|
|
|
|
sexual_maturity = 30
|
|
life_expectancy = 300
|
|
birth = None
|
|
|
|
@property
|
|
def age(self):
|
|
if self.birth is None:
|
|
return None
|
|
return self.now - self.birth
|
|
|
|
@default_state
|
|
@state
|
|
def newborn(self):
|
|
self.info("I am a newborn.")
|
|
self.birth = self.now
|
|
self.offspring = 0
|
|
return self.youngling, Delta(self.sexual_maturity - self.age)
|
|
|
|
@state
|
|
def youngling(self):
|
|
if self.age >= self.sexual_maturity:
|
|
self.info(f"I am fertile! My age is {self.age}")
|
|
return self.fertile
|
|
|
|
@state
|
|
def fertile(self):
|
|
raise Exception("Each subclass should define its fertile state")
|
|
|
|
@state
|
|
def dead(self):
|
|
self.die()
|
|
|
|
|
|
class Male(Rabbit):
|
|
max_females = 5
|
|
mating_prob = 0.001
|
|
|
|
@state
|
|
def fertile(self):
|
|
if self.age > self.life_expectancy:
|
|
return self.dead
|
|
|
|
# Males try to mate
|
|
for f in self.model.agents(
|
|
agent_class=Female, state_id=Female.fertile.id, limit=self.max_females
|
|
):
|
|
self.debug("FOUND A FEMALE: ", repr(f), self.mating_prob)
|
|
if self.prob(self["mating_prob"]):
|
|
f.impregnate(self)
|
|
break # Do not try to impregnate other females
|
|
|
|
|
|
class Female(Rabbit):
|
|
gestation = 10
|
|
conception = None
|
|
|
|
@state
|
|
def fertile(self):
|
|
# Just wait for a Male
|
|
if self.age > self.life_expectancy:
|
|
return self.dead
|
|
if self.conception is not None:
|
|
return self.pregnant
|
|
|
|
@property
|
|
def pregnancy(self):
|
|
if self.conception is None:
|
|
return None
|
|
return self.now - self.conception
|
|
|
|
def impregnate(self, male):
|
|
self.info(f"impregnated by {repr(male)}")
|
|
self.mate = male
|
|
self.conception = self.now
|
|
self.number_of_babies = int(8 + 4 * self.random.random())
|
|
|
|
@state
|
|
def pregnant(self):
|
|
self.debug("I am pregnant")
|
|
|
|
if self.age > self.life_expectancy:
|
|
self.info("Dying before giving birth")
|
|
return self.die()
|
|
|
|
if self.pregnancy >= self.gestation:
|
|
self.info("Having {} babies".format(self.number_of_babies))
|
|
for i in range(self.number_of_babies):
|
|
state = {}
|
|
agent_class = self.random.choice([Male, Female])
|
|
child = self.model.add_node(agent_class=agent_class, **state)
|
|
child.add_edge(self)
|
|
if self.mate:
|
|
child.add_edge(self.mate)
|
|
self.mate.offspring += 1
|
|
else:
|
|
self.debug("The father has passed away")
|
|
|
|
self.offspring += 1
|
|
self.mate = None
|
|
return self.fertile
|
|
|
|
def die(self):
|
|
if self.pregnancy is not None:
|
|
self.info("A mother has died carrying a baby!!")
|
|
return super().die()
|
|
|
|
|
|
class RandomAccident(BaseAgent):
|
|
def step(self):
|
|
rabbits_alive = self.model.G.number_of_nodes()
|
|
|
|
if not rabbits_alive:
|
|
return self.die()
|
|
|
|
prob_death = self.model.get("prob_death", 1e-100) * math.floor(
|
|
math.log10(max(1, rabbits_alive))
|
|
)
|
|
self.debug("Killing some rabbits with prob={}!".format(prob_death))
|
|
for i in self.iter_agents(agent_class=Rabbit):
|
|
if i.state_id == i.dead.id:
|
|
continue
|
|
if self.prob(prob_death):
|
|
self.info("I killed a rabbit: {}".format(i.id))
|
|
rabbits_alive -= 1
|
|
i.die()
|
|
self.debug("Rabbits alive: {}".format(rabbits_alive))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
from soil import easy
|
|
|
|
with easy("rabbits.yml") as sim:
|
|
sim.run()
|