My “improved” version of ragespectate’s janken

ragespectate-rockpaperscissors.py

#!/usr/bin/env python
import random

def intro():
    print('Welcome to Rock, Paper, Scissors!')

def user():
    user_move = ''
    while user_move != 'r' and user_move != 'p' and user_move != 's':
        user_move = input('What is your move? (r,p,s) ')
    return user_move

def computer():
    return random.choice(['s','r','p'])

def score(user_move, comp_move):
    # confusing ridiculous for the fewer lines :-p
    moves = 'rps'
    user_minus_comp = (moves.index(user_move) - moves.index(comp_move)) % len(moves)
    if user_minus_comp == 0:
        return 0, 0
    # e.g., user played paper and computer rock
    if user_minus_comp == 1:
        return 1, 0
    return 0, 1

if __name__ == "__main__":
    user_score = 0
    comp_score = 0
    intro()
    while True:
        user_move = user()
        comp_move = computer()
        score_delta = score(user_move, comp_move)
        user_score += score_delta[0]
        comp_score += score_delta[1]
        print('You played %s. The computer played %s.' % (user_move, comp_move))
        print(user_score, comp_score)