class Comment():
    def __init__(self, username, content, likes=0):
        self.username = username
        self.content = content
        self.likes = likes

comment = Comment('user1', "I like this book")
print (comment.username)
print (comment.content)
print (comment.likes)
class Comment():
    def __init__(self, username, content, likes=0):
        self.username = username
        self.content = content
        self.likes = likes

comment = Comment('user1', "I like this book")
print (comment.username)
print (comment.content)
print (comment.likes)