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jackfischer/monty.py

Last active December 16, 2016 19:45
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Simple monty hall problem simulation
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monty.py
import random
trials = 100
stay = []
switch = []
for t in range(trials):
possibilities = [1,2,3]
ans = random.choice(possibilities)
stay_ans = random.choice(possibilities)
stay.append(stay_ans == ans) #either true or false
possibilities = set(possibilities)
discard = possibilities.difference(set((stay_ans, ans))).pop()
switch_ans = possibilities.difference(set((stay_ans, discard))).pop()
switch.append(switch_ans == ans)
stay_win = sum(stay)*100/len(stay)
print("Stay win %d%%" % stay_win)
switch_win = sum(switch)*100/len(switch)
print("Switch win %d%%" % switch_win)
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