python学习17——字典。

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 birthdar yo you"])
bulls_on_parade = Song(["they rally around the family", "with pockets full of shells"])
happy_bday.sing_me_a_song()
bulls_on_parade.sing_me_a_song()

输出结果：

注意：

__init__ 的左右两侧各有两个“_”，如果只输入一个，会出现：TypeError: Song() takes no arguments