Python网页抓取之Lxml

Lxml是基于libxml2这一XML解析库的Python封装。该模块使用C语言编写，解析速度比BeautifulSoup更快。

Lxml可以正确解析属性两侧缺失的引号，并闭合标签。如案例一

案例二是Lxml的CSS选择器抽取面积数据的实例代码

#coding=utf-8
import lxml.html
import urllib
#import cssselect
"""案例一"""
#缺省的代码
# broken_html = '<ul class=country><li>area<li>population</ul>'
#
# tree = lxml.html.fromstring(broken_html)
# fixed_html = lxml.html.tostring(tree,pretty_print=True)
# print fixed_html
"""案例二"""
url = "http://example.webscraping.com/places/view/united-Kingdom-239"
html = urllib.urlopen(url).read()
tree = lxml.html.fromstring(html)
td = tree.cssselect('tr#places_area__row > td.w2p_fw')[0]
area = td.text_content()
print area