rpsls.py

import random


# helper functions
def name_to_number(name):
    if name == "rock":
        number = 0
    elif name == "Spock":
        number = 1
    elif name == "paper":
        number = 2
    elif name == "lizard":
        number = 3
    elif name == "scissors":
        number = 4
    else:
        print "Error: no matching number for that name."
        number = 5
    return number


def number_to_name(number):
    if number == 0:
        name = "rock"
    elif number == 1:
        name = "Spock"
    elif number == 2:
        name = "paper"
    elif number == 3:
        name = "lizard"
    elif number == 4:
        name = "scissors"
    else:
        print "Error: no matching number for that name."
        name = "Error"
    return name


def rpsls(player_choice):
    # print a blank line to separate consecutive games
    print "\n"
    # print out the message for the player's choice
    print "Player chooses " + player_choice
    # convert the player's choice to player_number using the function
    # name_to_number()
    player_number = name_to_number(player_choice)
    # compute random guess for comp_number using random.randrange()
    comp_number = random.randrange(0, 5)
    # convert comp_number to comp_choice using the function number_to_name()
    comp_choice = number_to_name(comp_number)
    # print out the message for computer's choice
    print "Computer chooses " + comp_choice
    # compute difference of comp_number and player_number modulo five
    difference = (player_number - comp_number) % 5
    # use if/elif/else to determine winner, print winner message
    if difference == 0:
        print "Player and Computer tie!"
    elif difference in [1, 2]:
        print "Player wins!"
    else:
        print "Computer wins!"



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

rpsls(number_to_name(random.randrange(0, 5)))