擅长:python、mysql、java
<p>在<code>__init__</code>方法中,在</strong>设置<code>self.markers</code>之前调用<code>self.set_marker()</code><strong>:</p>
<pre><code>self.set_marker(marker)
self.markers = {
"-" : u"None" ,
"," : u"\u2219"
}
</code></pre>
<p>所以当<code>set_marker()</code>运行时,没有<code>self.markers</code><strong>而</strong>。将呼叫下移一行:</p>
^{pr2}$