#!/usr/bin/env python

#
# a simple guessing game that uses Python's random
# number generator to come up with a number to be
# guessed by the user.
#
# version 2 - uses more functions and different
#    examples of users interacting with the
#    the program.
#      
# written by e.bonakdarian   oct 14, 2010


# "get/make accessible" the random number generator
from random import randint


# set lower and upper bounds on the number to be guessed
# see how this propagates throughout the code
LOW = 0
HIGH  = 10


############################################################
def play_game():
    # play the game with guesses in the range LOW, HIGH

    target = randint(LOW, HIGH)   # number to be guessed
    guess = input('Enter a number in range %d - %d: '
                    %(LOW, HIGH)) # get user's guess

    if guess == target:  
        print 'You win!'
    else:
        print 'You lost :-) .. the number was %d' % target



############################################################
def main():
    # start game(s)
    print 'We will play a simple guessing game.\n'
    play_game()

    answer = raw_input('\nDo you want to play again (y/n)? ')
    
    answer = answer.lower() # convert answer to lower case

    if answer == 'y':   # boolean comparison 
        play_game()
    elif answer == 'n':
        print 'Ok, sorry to see you go.'
    else:
        print '"%s" is an invalid response (y/n are valid)' % answer



if __name__ == "__main__":
    main()

    print '\nQuitting program.',  # note, comma prevents linefeed
    raw_input('Enter <exit> to exit ...')