擅长:python、mysql、java
<p>我相信错误是从这里来的:</p>
<pre><code>hallAndOats.print('Songs by {}'.format(self.name))
hueyLewis.print('Songs by {}'.format(self.name))
toto.print('Songs by {}'.format(self.name))
myAwesomePlaylist.print()
</code></pre>
<p>你应该用</p>
<h2>.Artist类的打印列表</h2>
<h2>.printFunct用于类“Album”和</h2>
<h2>。为类“Playlist”打印歌曲</h2>
<p>只能使用在类中定义的函数。希望有帮助。:)</p>