How to use methods in Python

class Song(object):
    
    def __init__ (self, lyrics):
        self.lyrics = lyrics
        
    def sing_me_a_song(self):
        for line in self.lyrics:
            print(line)
            
happy_bday = Song(["Happy birthday to you",
                   "I don't want to get sued",
                   "So I'll stop right there"])
                   
bulls_on_parade = Song(["They rally around tha family",
                        "With pockets full of shells"])
                        

testing = "I am testing a coding exercise"

print(testing)

# Compare the following two notice what the square brackets do to the formatting of the output
testing = Song(testing)
testing = Song([testing])

happy_bday.sing_me_a_song()

bulls_on_parade.sing_me_a_song()

testing.sing_me_a_song()