python中PyQuery库是什么？

>>> pip3 install pyquery

from pyquery import PyQuery as pq

from pyquery import PyQuery as pq

html = '''

<div id="container">

<ul class="list">

<li class="item-0">first item</li>

<li class="item-1"><a href="link2.html">second item</a></li>

<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>

<li class="item-1 active"><a href="link4.html">fourth item</a></li>

<li class="item-0"><a href="link5.html">fifth item</a></li>

</ul>

</div>

'''

doc=pq(html)

print(doc("#container .list li"))