# Rock-paper-scissors-lizard-Spock template

# The key idea of this program is to equate the strings
# "rock", "paper", "scissors", "lizard", "Spock" to numbers
# as follows:
#
# 0 - rock
# 1 - Spock
# 2 - paper
# 3 - lizard
# 4 - scissors

import random

def name_to_number(name):
    if name == "rock":
        return 0
    elif name == 'Spock':
        return 1
    elif name == 'paper':
        return 2
    elif name == 'lizard':
        return 3
    elif name == 'scissors':
        return 4
    else :
        return None

def number_to_name(number):
    if number == 0:
        return "rock"
    elif number == 1:
        return 'Spock'
    elif number == 2:
        return 'paper'
    elif number == 3:
        return 'lizard'
    elif number == 4:
        return 'scissors'
    else :
        return None

def rpsls(player_choice):
    print ""
    print "Player chooses",player_choice
    player_number = name_to_number(player_choice)
    comp_number = random.randrange(5)
    comp_choice = number_to_name(comp_number)
    print "Computer chooses",comp_choice
    diff = (player_number - comp_number)%5
    if (diff == 1) or (diff == 2):
        print "Player wins!"
    elif (diff == 3) or (diff == 4):
        print "Computer wins!"
    else :
        print "Tie!"

rpsls("rock")
rpsls("Spock")
rpsls("paper")
rpsls("lizard")
rpsls("scissors")

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