RPSLS

rps.py

# Copyright 2014 Michael Rice <michael@michaelrice.org>
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#from __future__ import print_function

import random
# 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

# helper functions

NAME_RPSLS = {'rock': 0, 'Spock': 1, 'paper': 2, 'lizard': 3, 'scissors': 4}

NUM_RPSLS = dict(zip(NAME_RPSLS.values(), NAME_RPSLS.keys()))


def name_to_number(name):
    return NAME_RPSLS.get(name)


def number_to_name(number):
    return NUM_RPSLS.get(number)


def rpsls(player_choice):

    # print a blank line to separate consecutive games
    print

    # convert the player's choice to player_number using the function name_to_number()
    player_number = name_to_number(player_choice)

    # print out the message for the player's choice
    print "Player chooses {0}".format(player_choice)
    #+ '->' + str(player_number)

    # compute random guess for comp_number using random.randrange()
    comp_number = random.randrange(0, len(NAME_RPSLS))

    # 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 {0}'.format(comp_choice)
    #+ '->' + str(comp_number)

    # compute difference of comp_number and player_number modulo five
    modulo_diff = (player_number - comp_number) % 5

    if modulo_diff is 0:
        print 'Player and computer tie!'
    elif modulo_diff > 2:
        print 'Computer Wins!'
    else:
        print 'Player Wins!'


# test your code - THESE CALLS MUST BE PRESENT IN YOUR SUBMITTED CODE
rpsls("rock")
rpsls("Spock")
rpsls("paper")
rpsls("lizard")
rpsls("scissors")

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