Algo Sniffer 4

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

Source code:

import random
#hopefully fixes a stupid bug in Algo Sniffer 3.2, 3.1 and 3
#guesses the algorithm that the opponent is using
#should always beat play last input, beat last input, always play rock, and skynet2
if not input:
	nummoves = 0
	urmoves = ['R','P','S']
	mode = 0
	lastoutput = 0

if nummoves<3: #for the first 3 moves, play R, P, S.
	if nummoves==0:
		lastoutput = output = 'R'
	elif nummoves==1:
		lastoutput = output = 'P'
		urmoves[0]=input;
	elif nummoves==2:
		lastoutput = output = 'S'
		urmoves[1]=input;
	nummoves += 1
else:
	if mode==0:
		urmoves[2] = input
		if urmoves == ['P','R','P']: #you are play last input
			mode=1
		elif urmoves == ['P','P','S'] or urmoves == ['R','P','S']: #you are beat last input
			mode=2
		elif urmoves == ['R','R','R']: #you are always play rock
			mode=3
		elif urmoves == ['S','S','R']: #you are skynet2
			mode=4
		else: #I don't know who you are but I'll always beat your last input
			mode=5
		#print "urmoves:"
		#print urmoves
		#print "mode:"
		#print mode
			
	if mode==1:
		lastoutput = output = {'R':'P', 'P':'S', 'S':'R'}[lastoutput]
	elif mode==2:
		lastoutput = output = {'R':'S', 'P':'R', 'S':'P'}[lastoutput]
	elif mode==3:
		lastoutput = output = 'P'
	elif mode==4:
		lastoutput = output = {'R':'R', 'P':'P', 'S':'S'}[lastoutput]
	else:
		lastoutput = output = {'R':'P', 'P':'S', 'S':'R'}[input]
		
#print "ur"
#print input
#print "my"
#print output