擅长:python、mysql、java
<blockquote>
<p>In this classe we are extending the "dict" class? This is a built-in class?</p>
</blockquote>
<p>您实际上是在扩展基<code>dict</code><a href="http://docs.python.org/library/stdtypes.html#typesmapping" rel="nofollow">class</a>。这是Python中的一个本机类。在Python的早期版本中,您无法扩展本机类,但随着<a href="http://docs.python.org/reference/datamodel.html#new-style-and-classic-classes" rel="nofollow">new-style classes</a>的变化,情况发生了变化。在</p>
<blockquote>
<p>What is the meaning of "super"?</p>
</blockquote>
<p>函数<code>super</code><a href="http://docs.python.org/library/functions.html#super" rel="nofollow">lets you find</a>是给定类的父类,使用与继承相同的顺序。在</p>
<blockquote>
<p>What is the meaning of the * and the ** in the parameters "args" and "kwds"?</p>
</blockquote>
<p><code>*args</code>用包含非命名参数的元组展开,而{<cd4>}则扩展为包含命名参数的字典。管理参数数目可变的函数是<a href="http://docs.python.org/reference/compound_stmts.html#function-definitions" rel="nofollow">a way</a>。在</p>