擅长:python、mysql、java
<p>这是嵌套列表而不是字典:</p>
<pre><code>foldersinlist = [['Training'], ['Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']]
</code></pre>
<p>这是一个简单的列表:</p>
<pre><code>['Training', 'Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']
</code></pre>
<p>只要做:</p>
<pre><code>ll = sum(foldersinlist , [])
</code></pre>