bob.py

def bottles_of_beer(bob):
    if bob < 1:
        print("""No more bottles of beer on the wall. No more 
                 bottles of beer.""")
        return
    tmp = bob
    bob -= 1
    print("""{} bottles of beer on the wall. {} bottles
             of beer. Take one down, pass it around, 
             {} bottles of beer on the wall.""".format(tmp, tmp, bob))
    bottles_of_beer(bob)