Pythonで99 bottles

bottles.py

#!/usr/bin/python
def plural(num):
    if num == 0:
        return "No more bottles"
    elif num == 1:
        return "1 bottle"
    else:
        return str(num) + " bottles"

def overLylic(num):
    return plural(num) + " of beer on the wall, " + plural(num).lower() + " of beer."

def underLylic(num):
    if num == 0:
        return "Go to the store and buy some more, 99 bottles of beer on the wall."
    else:
        return "Take one down and pass it around, " + plural(num-1).lower() + " of beer on the wall."

for num in reversed(range(0, 4)):
    print ""
    print overLylic(num)
    print underLylic(num)