switching8

 Author pyfex Submission date 2011-06-14 07:20:43.479520 Rating 7693 Matches played 5343 Win rate 76.74

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

Source code:

``````# Extend switching7: Also look only at opponent/mymoves
import random

if input == "":
hist = ""
opp_hist = ""
my_hist = ""
opp_played = []
counter = {'P': 'S', 'S': 'R', 'R': 'P'}
score = {'RR': 0, 'PP': 0, 'SS': 0, 'PR': 1, 'RS': 1, 'SP': 1,'RP': -1, 'SR': -1, 'PS': -1,}
output = random.choice(["R", "P", "S"])

predict1 = [output, output]
predict2 = [output] * 18
correct1 = [0, 0]
correct2 = [(0,0)] * len(predict2)
else:
hist += output.lower()+input
opp_hist += input
my_hist += output
opp_played.append(input)
correct1[0] += score[predict1[0]+input]
correct1[1] += score[predict1[1]+input]

for i, p in enumerate(predict2):
correct2[i] = ({1:correct2[i][0]+1, 0: correct2[i][0], -1: 0}[score[p+input]],  correct2[i][1]+score[p+input])

index1 = correct1.index(max(correct1))
index2 = correct2.index(max(correct2))

predict1[1] = counter[random.choice(opp_played)]
rh = random.choice(["R", "P", "S"])

for length in range(min(10, len(hist)-2), 0, -2):
search = hist[-length:]
idx = hist.rfind(search, 0, -2)
if idx != -1:
my = hist[idx+length].upper()
opp = hist[idx+length+1]
predict2[0] = counter[opp]
predict2[1] = counter[counter[my]]
predict2[2] = counter[counter[opp]]
predict2[3] = counter[my]
predict2[4] = opp
predict2[5] = my
break
else:
for i in range(6):
predict2[i] = rh

for length in range(min(5, len(opp_hist)-1), -1):
opp_search = opp_hist[-length]
idx = opp_hist.rfind(opp_search, 0, -1)
if idx != -1:
my = my_hist[idx+length]
opp = opp_hist[idx+length]
predict2[6] = counter[opp]
predict2[7] = counter[counter[my]]
predict2[8] = counter[counter[opp]]
predict2[9] = counter[my]
predict2[10] = opp
predict2[11] = my
break
else:
for i in range(6,12):
predict2[i] = rh

for length in range(min(5, len(my_hist)-1), -1):
my_search = my_hist[-length:]
idx = my_hist.rfind(my_search, 0, -1)
if idx != -1:
my = my_hist[idx+length]
opp = opp_hist[idx+length]
predict2[12] = counter[opp]
predict2[13] = counter[counter[my]]
predict2[14] = counter[counter[opp]]
predict2[15] = counter[my]
predict2[16] = opp
predict2[17] = my
break
else:
for i in range(12,18):
predict2[i] = rh

predict1[0] = predict2[index2]

output = predict1[index1]``````