擅长:python、mysql、java
<p>试着这样做:</p>
<pre class="lang-py prettyprint-override"><code>list1 = ['a','b','a','b']
l2 =['e','d']
print([el1+'_'+el2 for el2 in l2 for el1 in sorted(set(list1))])
</code></pre>
<p>输出:</p>
<pre><code>['a_e', 'b_e', 'a_d', 'b_d']
</code></pre>