import sys def happy_new_year(): print "Happy new year" def hello(): print "Hello, world!" def quine(): print src def bottles(): for i in range(99, 2, -1): print "%d bottles of beer on the wall" % i print "%d bottles of beer" % i print "Take one down, pass it around" print "%d bottles of beer on the wall" % (i - 1) print print "2 bottles of beer on the wall" print "2 bottles of beer" print "Take one down, pass it around" print "1 bottle of beer on the wall" print print "1 bottle of beer on the wall" print "1 bottle of beer" print "Take one down, pass it around" print "No more bottles of beer on the wall" print print "No more bottles of beer on the wall" print "No more bottles of beer on the wall" print "Go to the store and buy some more" print "99 bottles of beer on the wall." print def incr(): acc += 1 if len(sys.argv) != 2: print "Usage: ./yhq9p.py script.yhq9" sys.exit(1) else: f = sys.argv[1] try: s = open(f, "r") except IOError, e: print "Can't open file: " + str(e.args[1]) sys.exit(1) acc = 0 src = s.read() # Implement interpreter using a dispatch table dispatch = { 'y': happy_new_year, 'h': hello, 'q': quine, '9': bottles, '+': incr } for i in src.lower(): if i in dispatch: dispatch[i]()