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soil/benchmarks/virusonnetwork/soil_states.py
2023-05-19 16:19:50 +02:00

91 lines
2.7 KiB
Python

# Verbatim copy from mesa
# https://github.com/projectmesa/mesa/blob/976ddfc8a1e5feaaf8007a7abaa9abc7093881a0/examples/virus_on_network/virus_on_network/model.py
import math
from enum import Enum
import networkx as nx
from soil import *
class VirusOnNetwork(Environment):
"""A virus model with some number of agents"""
num_nodes = 10
avg_node_degree = 3
initial_outbreak_size = 1
virus_spread_chance = 0.4
virus_check_frequency = 0.4
recovery_chance = 0
gain_resistance_chance = 0
def init(self):
prob = self.avg_node_degree / self.num_nodes
# Use internal seed with the networkx generator
self.create_network(generator=nx.erdos_renyi_graph, n=self.num_nodes, p=prob)
self.initial_outbreak_size = min(self.initial_outbreak_size, self.num_nodes)
self.populate_network(VirusAgent)
# Infect some nodes
infected_nodes = self.random.sample(list(self.G), self.initial_outbreak_size)
for a in self.agents(node_id=infected_nodes):
a.set_state(VirusAgent.infected)
assert self.number_infected == self.initial_outbreak_size
def step(self):
super().step()
@report
@property
def resistant_susceptible_ratio(self):
try:
return self.number_resistant / self.number_susceptible
except ZeroDivisionError:
return math.inf
@report
@property
def number_infected(self):
return self.count_agents(state_id=VirusAgent.infected.id)
@report
@property
def number_susceptible(self):
return self.count_agents(state_id=VirusAgent.susceptible.id)
@report
@property
def number_resistant(self):
return self.count_agents(state_id=VirusAgent.resistant.id)
class VirusAgent(Agent):
virus_spread_chance = None # Inherit from model
virus_check_frequency = None # Inherit from model
recovery_chance = None # Inherit from model
gain_resistance_chance = None # Inherit from model
@state(default=True)
async def susceptible(self):
await self.received()
return self.infected
@state
def infected(self):
susceptible_neighbors = self.get_neighbors(state_id=self.susceptible.id)
for a in susceptible_neighbors:
if self.prob(self.virus_spread_chance):
a.tell(True, sender=self)
if self.prob(self.virus_check_frequency):
if self.prob(self.recovery_chance):
if self.prob(self.gain_resistance_chance):
return self.resistant
else:
return self.susceptible
@state
def resistant(self):
return self.at(INFINITY)
from _config import run_sim
run_sim(model=VirusOnNetwork)