1 #! /usr/bin/env python

     2 # By GvR, demystified after a version by Fredrik Lundh.

     3 import sys

     4 n = 100

     5 if sys.argv[1:]: n = int(sys.argv[1])

     6 def bottle(n):

     7     if n == 0: return "no more bottles of beer"

     8     if n == 1: return "one bottle of beer"

     9     return str(n) + " bottles of beer"

    10 for i in range(n):

    11     print bottle(n-i), "on the wall,"

    12     print bottle(n-i) + "."

    13     print "Take one down, pass it around,"

    14     print bottle(n-i-1), "on the wall."