CNB.py

import random


ATTACKS = ('Cowboy', 'Ninja', 'Bear')

COWBOY = 0
NINJA = 1
BEAR = 2


def title():
    header = ', '.join(ATTACKS)
    print header
    print '_' * len(header)
    options()


def options():
    print '''
    You can have the following options available:
    c for cowboy
    n for ninja
    b for bear
    r for rules
    q for quit
    '''


def rules():
    print '''
    Rules:
    - Ninja beats Cowboy using lightning speed ninja kicks
    - Cowboy beats Bear with his quick draw and perfect accuracy
    - Bear beats Ninja with a strong swipe of his clawed paw
    '''
    options()


def goodbye():
    print 'Thanks for playing the game. Bye!'


def printPick(attack):
    print 'Computer picked {}'.format(ATTACKS[attack])


def show_winner(user, computer):
    winner = None
    if user == computer:
        winner = 'We tied!'
    elif user == NINJA and computer == COWBOY or user == COWBOY and computer == NINJA:
        winner = 'Ninja beats cowboy.'
    elif user == COWBOY and computer == BEAR or user == BEAR and computer == COWBOY:
        winner = 'Cowboy beats bear.'
    elif user == BEAR and computer == NINJA or user == NINJA and computer == BEAR:
        winner = 'Bear beats Ninja.'

    print winner


def battle(user_attack):
    computer_attack = random.randint(0, 2)
    printPick(computer_attack)
    show_winner(user_attack, computer_attack)


if __name__ == "__main__":

    title()
    while True:
        choice = str(raw_input('Please make your selection: ')).lower()
        if choice == "q":
            goodbye()
            break
        elif choice in ['c', 'n', 'b']:
            if choice == 'c':
                battle(0)
            elif choice == 'n':
                battle(1)
            else:
                battle(2)
        else:
            print 'Invalid choice'
            rules()