# switching3

 Author pyfex Submission date 2011-06-10 04:10:13.762102 Rating 7228 Matches played 5173 Win rate 74.95

Use rpsrunner.py to play unranked matches on your computer.

## Source code:

``````# Should fix a bug in switching2

import random

if input == "":
dna = ""
opp = []

anti_expected = {'P': 'S', 'S': 'R', 'R': 'P'}
dna_encode = {'PP': '1',
'PR': '2',
'PS': '3',
'RP': '4',
'RS': '5',
'RR': '6',
'SS': '7',
'SP': '8',
'SR': '9',}
dna_decode = {'1':'PP',
'2':'PR',
'3':'PS',
'4':'RP',
'5':'RS',
'6':'RR',
'7':'SS',
'8':'SP',
'9':'SR',}
score = {'RR': 1, 'PP': 1, 'SS': 1,
'PR': 2, 'RS': 2, 'SP': 2,
'RP': 0, 'SR': 0, 'PS': 0,}
output = random.choice(["R", "P", "S"])

index = random.randint(0,2)
predicted = [output] * 3
correct = [0, 0, 0]
else:
dna += dna_encode[input + output]
opp.append(input)
sc = score[output+input]

for i in range(3):
s = score[predicted[i]+input]
if s == 0:
correct[i] = 0
elif s == 2:
correct[i] += 1

if sc == 0:
m = max(correct)
index = correct.index(m)

predicted[0] = anti_expected[random.choice(opp)]

for length in range(min(4, len(dna)-1), 0, -1):
search = dna[-length:]
idx = dna.rfind(search, 0, -1)
if idx != -1: