File: beer.py

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#! /usr/bin/env python
# By GvR, demystified after a version by Fredrik Lundh.
import sys
n = 100
if sys.argv[1:]: n = int(sys.argv[1])
def bottle(n):
    if n == 0: return "no more bottles of beer"
    if n == 1: return "one bottle of beer"
    return str(n) + " bottles of beer"
for i in range(n):
    print bottle(n-i), "on the wall,"
    print bottle(n-i) + "."
    print "Take one down, pass it around,"
    print bottle(n-i-1), "on the wall."