擅长:python、mysql、java
<p>我会用<a href="https://docs.python.org/2/library/itertools.html#itertools.product" rel="nofollow noreferrer">^{<cd1>}</a>来表示:</p>
<pre><code>finallist = list(map(list, itertools.product(*[simpleline,otherline,nextline])))
>>> finallist
[[4, 5, 1], [4, 5, 2], [4, 7, 1], [4, 7, 2]]
</code></pre>
<p>如果您也需要<code>middlelist</code>:</p>
<pre><code>middlelist = list(map(list, itertools.product(*[simpleline,otherline])))
>>> middlelist
[[4, 5], [4, 7]]
</code></pre>