repeat_lyrics()

def print_lyrics():
    print "I'm a lumberjack, and I'm okay."
    print "I sleep all night and I work all day."

def repeat_lyrics():
    print_lyrics()
    print_lyrics()

#Error

#Traceback (most recent call last):
#  File "3-1.py", line 1, in <module>
#    repeat_lyrics()
#NameError: name 'repeat_lyrics' is not defined
