<p>我运行了这段代码,得到如下错误:</p>
<pre><code>Traceback (most recent call last):
File "urllister.py", line 26, in <module>
for k in l: print k,"points to",l[k],"\n"
RuntimeError: dictionary changed size during iteration
</code></pre>
<p>我唯一要做的就是在第27行的for循环中打印</p>
^{pr2}$