擅长:python、mysql、java
<p>您正在for循环中重新分配<code>list1</code>:</p>
<pre><code>for k, list1 in enumerate([list1,list2]):
</code></pre>
<p>这意味着在上一次迭代中,您隐式地执行<code>list1 = list2</code></p>
<p>从<a href="https://docs.python.org/2/library/functions.html#enumerate" rel="nofollow">docs</a></p>
<blockquote>
<p>enumerate() returns a tuple containing a count (from start which defaults to 0) and the values obtained from iterating over sequence</p>
</blockquote>