python爬虫分析利器，pyquery
https://pypi.python.org/pypi/pyquery
Quickstart
You can use the PyQuery class to load an xml document from a string, a lxml document, from a file or from an url:
>>> 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, **kw: urllib.urlopen(url).read())
>>> d = pq(filename=path_to_html_file)
Now d is like the $ in jquery:
>>> d("#hello")
[<p#hello.hello>]
>>> p = d("#hello")
>>> print(p.html())
Hello world !
>>> p.html("you know <a href='http://python.org/'>Python</a> rocks")
[<p#hello.hello>]
>>> print(p.html())
you know <a href="http://python.org/">Python</a> rocks
>>> print(p.text())
you know Python rocks
You can use some of the pseudo classes that are available in jQuery but that are not standard in css such as :first :last :even :odd :eq :lt :gt :checked :selected :file:
>>> d('p:first')
[<p#hello.hello>]
See http://packages.python.org/pyquery/ for the full documentation