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Nash.py
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Nash.py
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# coding: utf-8
from numpy import *
class Agent(object):
def __init__(self, label, trust_level=0.5, strategy=""):
self.score = 0
self.trust_level = trust_level
self.label = str(label)
self.strategy = strategy
self.games_played = 0
def __str__(self):
return self.label
def __repr__(self):
return self.label
class Game:
def __init__(self, agent1=Agent("Alice"), agent2=Agent("Bob"), label="Alice vs Bob"):
self.agentA = agent1
self.agentB = agent2
self.inclusive_cooperate = 1
self.inclusive_defect = 3
self.exclusive_defect = 0
self.exclusive_cooperate = 5
self.label = str(label)
self.choices = ['defect', 'cooperate']
self.agentA.strategy = random.choice(self.choices, 1, p=[self.agentA.trust_level, 1 - self.agentA.trust_level])[0]
self.agentB.strategy = random.choice(self.choices, 1, p=[self.agentB.trust_level, 1 - self.agentB.trust_level])[0]
def __str__(self):
return self.label
def __repr__(self):
return self.label
# to update the game is to play a round
def play(self):
if self.agentA.strategy == self.agentB.strategy == 'defect':
print self.agentA.label + " and " + self.agentB.label + " defected and scored " + str(self.inclusive_defect)
self.agentA.score += self.inclusive_defect
self.agentB.score += self.inclusive_defect
if self.agentA.strategy == self.agentB.strategy == 'cooperate':
print self.agentA.label + " and " + self.agentB.label + " cooperated and scored " + str(self.inclusive_cooperate)
self.agentA.score += self.inclusive_cooperate
self.agentB.score += self.inclusive_cooperate
if self.agentA.strategy != self.agentB.strategy and self.agentA.strategy == 'cooperate':
print self.agentA.label + " scored " + str(self.exclusive_cooperate) + " with " + self.agentA.strategy + " and " + self.agentB.label + " scored " + str(self.exclusive_defect) + " with " + self.agentB.strategy
self.agentA.score += self.exclusive_cooperate
self.agentB.score += self.exclusive_defect
if self.agentA.strategy != self.agentB.strategy and self.agentA.strategy == 'defect':
print self.agentA.label + " scored " + str(self.exclusive_defect) + " with " + self.agentA.strategy + " and " + self.agentB.label + " scored " + str(self.exclusive_cooperate) + " with " + self.agentB.strategy
self.agentA.score += self.exclusive_defect
self.agentB.score += self.exclusive_cooperate
def get_scores(self):
print self.agentA.label + " has " + str(self.agentA.score) + " points."
print self.agentB.label + " has " + str(self.agentB.score) + " points."