擅长:python、mysql、java
<p>你可以试试:</p>
<pre><code>sum([len(elem[1]) for elem in itemsData])
</code></pre>
<p>例如</p>
<pre><code>>>> itemsData = [('data1', [1, 2, 3, 4]), ('data2', [1, 2]), ('data3', [1, 2, 3])]
>>> sum([len(elem[1]) for elem in itemsData])
9
</code></pre>