擅长:python、mysql、java
<p><code>list.append()</code>不返回值。像这样使用:</p>
<pre><code> else:
val = busdict[bus].append(i)
print("else "+ bus ,val, str(i))
</code></pre>
<p>顺便说一下:<a href="http://legacy.python.org/dev/peps/pep-0008/#indentation" rel="nofollow">use four spaces for indents</a>!你知道吗</p>