Project 1 - Rock-paper-scissors-lizard-Spock.py

# Rock-paper-scissors-lizard-Spock template

# import for random generator
import random

# 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

# helper functions

# Converting the number to relevant name(string)
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:
        print "Choosen number is not in the range!"

# Converting a name(string) to relevant number
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:
        print "Please choose correct input!"

def rpsls(name):
    
    # convert name to player_number using name_to_number
    player_number = name_to_number(name)
    
    # compute random guess for comp_number using random.randrange()
    # random number N's range: 0 <= N < 5
    comp_number = random.randrange(0,5)
    
    # compute difference of player_number and comp_number modulo five
    diff = (player_number - comp_number) % 5
    
    # use if/elif/else to determine winner
    if diff == 1 or diff == 2:
        winner = "Player wins!"
    elif diff == 0:
        winner = "Player and computer tie!"
    else:
        winner = "Computer wins!"
    
    # convert comp_number to name using number_to_name
    comp_name = number_to_name(comp_number)
    
    # print results
    print "Player chooses", name
    print "Computer chooses", comp_name
    print winner
    print ""
    
# test your code
rpsls("rock")
rpsls("Spock")
rpsls("paper")
rpsls("lizard")
rpsls("scissors")

# always remember to check your completed program against the grading rubric