擅长:python、mysql、java
<p>去老学校怎么样:<a href="https://docs.python.org/3/library/functions.html#sum" rel="nofollow noreferrer">^{<cd1>}</a></p>
<h3>代码:</h3>
<pre><code>joined_list = sum(list_of_lists, [])
</code></pre>
<h3>测试代码:</h3>
<pre><code># List of variable size
list_of_lists = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
joined_list = sum(list_of_lists, [])
print(joined_list)
</code></pre>
<h3>结果:</h3>
<pre><code>[1, 2, 3, 4, 5, 6, 7, 8, 9]
</code></pre>