python html parse
[*]bs4:转换成unicode编码，http://www.crummy.com/software/BeautifulSoup/
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from bs4 import BeautifulSoup
soup = BeautifulSoup(open("index.html"))
soup = BeautifulSoup("data")
[*]Beautiful Soup将复杂HTML文档转换成一个复杂的树形结构,每个节点都是Python对象,所有对象可以归纳为4种: Tag , NavigableString ,BeautifulSoup , Comment .
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from bs4 import SoupStrainer
only_a_tags = SoupStrainer("a")
only_tags_with_id_link2 = SoupStrainer(id="link2")
def is_short_string(string):
return len(string) < 10
only_short_strings = SoupStrainer(text=is_short_string)
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BeautifulSoup(html_doc, "html.parser", parse_only=only_a_tags)
[*]lxml: python 对 libxml 的包装
[*]html5lib：纯python实现
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