擅长:python、mysql、java
<p>看起来<code>Archive.insertdoc</code>是类<code>Archive</code>的实例方法。也就是说,它必须在<code>Archive</code>的实例上调用:</p>
<pre><code>doc = Document(name, author, file)
archive = Archive() # Make an instance of class Archive
archive.insertdoc(doc) # Invoke the insertdoc method of that instance
</code></pre>