frequencies-at-depth-3

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

Source code:

import random

if input == '':
    num = {}
    lastinput = ''

numR = 0
numP = 0
numS = 0
if len(lastinput) == 2:
    threein = lastinput + input
    if threein in num:
        num[threein] += 1
    else:
        num[threein] = 1
    
    x = threein[1:]+'R'
    if x in num:
        numR = num[x]
    x = threein[1:]+'P'
    if x in num:
        numP = num[x]
    x = threein[1:]+'S'
    if x in num:
        numS = num[x]

if numR > numP and numR > numS:
    output = 'P'
elif numP > numR and numP > numS:
    output = 'S'
elif numS > numR and numS > numP:
    output = 'R'
elif numR == numP and numP == numS:
    output = random.choice(['R','P','S'])
elif numR == numP:
    output = 'P'
elif numR == numS:
    output = 'R'
else:
    output = 'S'

if len(lastinput) < 2:
    lastinput = lastinput + input
else:
    lastinput = lastinput[1:] + input