擅长:python、mysql、java
<p>这里的键是<a href="https://docs.python.org/3/library/collections.html#collections.namedtuple">^{<cd1>}</a>。文件上说</p>
<blockquote>
<p><code>collections.namedtuple(typename, field_names, verbose=False, rename=False)</code></p>
<p>Returns a new <code>tuple</code> <strong>subclass</strong> named <code>typename</code>. The new subclass is used to create <code>tuple</code>-like objects that have fields accessible by attribute lookup as well as being indexable and iterable. Instances of the subclass also have a helpful docstring (with typename and field_names) and a helpful <code>__repr__()</code> method which lists the tuple contents in a <code>name=value</code> format.</p>
</blockquote>
<p>没有pep8冲突;<code>Token</code>是一个用户定义的类,它的名称应该大写。在</p>