擅长:python、mysql、java
<p>不确定这是否是您要问的,但如果您只想知道列表<code>l</code>中是否存在元素,则可以展平<code>l</code>并使用操作符<code>in</code>,如下所示:</p>
<pre class="lang-py prettyprint-override"><code>>> l = [["one", "two"], ["three", "four"]]
>> one_is_in_l = "one" in [item for sublist in l for item in sublist]
>> print(one_is_in_l)
True
</code></pre>
<p>您也可以使用numpy来执行以下检查:</p>
<pre class="lang-py prettyprint-override"><code>>> l = [["one", "two"], ["three", "four"]
>> one_is_in_l = "one" in np.array(l)
>> print(one_is_in_l)
True
</code></pre>