<p>问题是:</p>
<blockquote>
<p>Write a loop that traverses:</p>
<pre><code>['spam!', 1, ['Brie', 'Roquefort', 'Pol le Veq'], [1, 2, 3]]
</code></pre>
<p>and prints the length of each element.</p>
</blockquote>
<p>我试过作为我的解决方案:</p>
<pre><code>list = ['spam!', 1,['Brie', 'Roquefort', 'Pol le Veq'], [1,2,3]]
element = 0
for i in list:
print len(list[element])
element += 1
</code></pre>
<p>但它收到这个错误:<code>TypeError: object of type 'int' has no len()</code></p>