jquery-like HTML parsing in Python?

If you are fluent with BeautifulSoup, you could just add soupselect to your libs.
Soupselect is a CSS selector extension for BeautifulSoup.

Usage:

from bs4 import BeautifulSoup as Soup
from soupselect import select
import urllib
soup = Soup(urllib.urlopen('http://slashdot.org/'))
select(soup, 'div.title h3')
    [<h3><span><a href='//science.slashdot.org/'>Science</a>:</span></h3>,
     <h3><a href='//slashdot.org/articles/07/02/28/0120220.shtml'>Star Trek</h3>,
    ..]

Consider PyQuery:

http://packages.python.org/pyquery/

>>> from pyquery import PyQuery as pq
>>> from lxml import etree
>>> import urllib
>>> d = pq("<html></html>")
>>> d = pq(etree.fromstring("<html></html>"))
>>> d = pq(url='http://google.com/')
>>> d = pq(url='http://google.com/', opener=lambda url: urllib.urlopen(url).read())
>>> d = pq(filename=path_to_html_file)
>>> d("#hello")
[<p#hello.hello>]
>>> p = d("#hello")
>>> p.html()
'Hello world !'
>>> p.html("you know <a href='http://python.org/'>Python</a> rocks")
[<p#hello.hello>]
>>> p.html()
u'you know <a href="http://python.org/">Python</a> rocks'
>>> p.text()
'you know Python rocks'