用python处理html代码的转义与还原
转义 escape:
import cgi
s = cgi.escape("""& < >""")# s = '& < >'
反转义 unescape:
#使用标准库
from htmllib import HTMLParser
h = HTMLparser.HTMLParser()
s = h.unescape('& < >') # s = u'& < >'
#使用BeautifulSoup
from bs4 import BeautifulSoup
soup =BeautifulSoup(html, \
convertEntities=BeautifulSoup.HTML_ENTITIES)
引用于:
http://fredericiana.com/2010/10/08/decoding-html-entities-to-text-in-python/
https://wiki.python.org/moin/EscapingHtml
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Python处理HTML转义字符抓网页数据经常遇到例如>或者 这种HTML转义符，抓到字符串里很是烦人。
比方说一个从网页中抓到的字符串
html ='<abc>'
用Python可以这样处理：
importHTMLParser
html_parser =HTMLParser.HTMLParser()
txt = html_parser.unescape(html)#这样就得到了txt = '<abc>'
如果还想转回去，可以这样：
importcgi
html = cgi.escape(txt)#这样又回到了 html = '<abc>'
来回转的功能还分了两个模块实现，挺奇怪。没找到更优美的方法，欢迎补充哈~
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html的escape和unescape
http://stackoverflow.com/questions/275174/how-do-i-perform-html-decoding-encoding-using-python-django
For html encoding, there's cgi.escape from the standard library:
>> help(cgi.escape)
cgi.escape = escape(s, quote=None)
Replace special characters "&", "<" and ">" to HTML-safe sequences.
If the optional flag quote is true, the quotation mark character (")
is also translated.
For html decoding, I use the following:
from htmlentitydefs import name2codepoint
# for some reason, python 2.5.2 doesn't have this one (apostrophe)
name2codepoint['#39'] = 39
def unescape(s):
"unescape HTML code refs; c.f.http://wiki.python.org/moin/EscapingHtml"
return re.sub('&(%s);' % '|'.join(name2codepoint),
lambda m: unichr(name2codepoint[m.group(1)]), s)
For anything more complicated, I use BeautifulSoup.