#! /usr/local/bin/python
# /////////////////////////////////////////////////////////////////////////
# /**
# * Title: rochambeau.py
# *
# * Description: Rock, Scissors, Paper Game.
# * Shows a clean way of implementing a 'switch'
# * statement in Python via a dictionary container.
# * The dictionary is made up of known 'named states' that
# * are tested in sequence for their current 'state'.
# *
# * Copyright: Copyright (c) 2003
# * This file is distributed as EXAMPLE SOURCE CODE ONLY!
# * The following code is considered 'Freeware' and can be
# * freely copied/reused/distributed as needed.
# *
# * Company: None
# * @author: Alan Haffner
# * @version 1.0
# */
#
# /////////////////////////////////////////////////////////////////////////
# Date: 02/16/03
import os, sys
import string, random
import types
def cli():
c = '?'
while c not in 'rps':
try:
print
# tailing index '[0]' picks only first char from input
c = raw_input('\tPlease enter (r)ock, (p)aper or (s)cissors to play... ')[0]
except IndexError:
# bad input, so like get another...
pass
c = c.lower()
# x, q... --> quit
if c in ('x', 'q' ):
raise 'USER_QUIT_ERROR'
return c
if __name__=='__main__':
errorCode = 0
stateList = ['r', 'p', 's']
validStates = { 'User Wins' : (('p','r'), ('r','s'), ('s','p')),
'No One Wins' : (('p','p'), ('r','r'), ('s','s')),
'Computer Wins' : (('r','p'), ('s','r'), ('p','s')),
}
try:
while 1:
testTuple = (None, None)
userInput = None
computerInput = '?'
userInput = cli()
computerInput = ( stateList[random.randint(0,2)] )
testTuple = (userInput, computerInput)
for select in validStates:
if testTuple in validStates[select]:
print
print "You chose: ", userInput
print "The computer chose:", computerInput
print " ****", select, " ****"
print
# Note: By convention, all local exception 'constants' end
# in '_ERROR' regaurdless of their intended use.
except KeyboardInterrupt:
print '\n' * 3
print '[interrupted by user]'
print '\n' * 3
except 'USER_QUIT_ERROR':
print '\n' * 3
print '[interrupted by user]'
print '\n' * 3
except:
# unexpected error
print '\n' * 3
traceback.print_exc()
print '\n' * 3
errorCode = 2
sys.exit(errorCode)
