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https://github.com/gsi-upm/soil
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3776c4e5c5
* Removed references to `set_state` * Split some functionality from `agents` into separate files (`fsm` and `network_agents`) * Rename `neighboring_agents` to `neighbors` * Delete some spurious functions
88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
from soil.agents import FSM, NetworkAgent, state, default_state, prob
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import logging
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class DumbViewer(FSM, NetworkAgent):
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"""
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A viewer that gets infected via TV (if it has one) and tries to infect
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its neighbors once it's infected.
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"""
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prob_neighbor_spread = 0.5
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prob_tv_spread = 0.1
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has_been_infected = False
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@default_state
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@state
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def neutral(self):
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if self["has_tv"]:
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if self.prob(self.model["prob_tv_spread"]):
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return self.infected
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if self.has_been_infected:
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return self.infected
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@state
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def infected(self):
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for neighbor in self.get_neighbors(state_id=self.neutral.id):
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if self.prob(self.model["prob_neighbor_spread"]):
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neighbor.infect()
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def infect(self):
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"""
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This is not a state. It is a function that other agents can use to try to
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infect this agent. DumbViewer always gets infected, but other agents like
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HerdViewer might not become infected right away
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"""
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self.has_been_infected = True
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class HerdViewer(DumbViewer):
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"""
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A viewer whose probability of infection depends on the state of its neighbors.
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"""
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def infect(self):
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"""Notice again that this is NOT a state. See DumbViewer.infect for reference"""
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infected = self.count_neighbors(state_id=self.infected.id)
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total = self.count_neighbors()
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prob_infect = self.model["prob_neighbor_spread"] * infected / total
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self.debug("prob_infect", prob_infect)
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if self.prob(prob_infect):
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self.has_been_infected = True
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class WiseViewer(HerdViewer):
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"""
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A viewer that can change its mind.
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"""
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defaults = {
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"prob_neighbor_spread": 0.5,
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"prob_neighbor_cure": 0.25,
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"prob_tv_spread": 0.1,
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}
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@state
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def cured(self):
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prob_cure = self.model["prob_neighbor_cure"]
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for neighbor in self.get_neighbors(state_id=self.infected.id):
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if self.prob(prob_cure):
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try:
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neighbor.cure()
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except AttributeError:
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self.debug("Viewer {} cannot be cured".format(neighbor.id))
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def cure(self):
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self.has_been_cured = True
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@state
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def infected(self):
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if self.has_been_cured:
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return self.cured
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cured = max(self.count_neighbors(self.cured.id), 1.0)
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infected = max(self.count_neighbors(self.infected.id), 1.0)
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prob_cure = self.model["prob_neighbor_cure"] * (cured / infected)
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if self.prob(prob_cure):
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return self.cured
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