擅长:python、mysql、java
<p>如果你现在求和,你就失去了参考。创建列表列表以维护引用</p>
<p>这样做的方式很老套:</p>
<pre><code>friendlies = []
enemies = []
everyone = [friendlies,enemies] # not sum, sublists
enemies.append("something")
print(sum(everyone,[])) # sum sublists to a new list
</code></pre>