擅长:python、mysql、java
<p>您正在重写test2中的<strong>init</strong></p>
<p><strong>将在<strong>中完成<strong>初始化测试。因此<strong>init</strong>函数中不再有print int。在</p>
<pre><code>def __init__(self):
self.DerivedA = None
self.DerivedB = None
self.DerivedC = None
</code></pre>