如何使用python使Escape Sequence to Character Entities

Question

I am a fresh pythoner, thank for help me. I just want to make the Escape Sequence to Character Entities, like the < change to < , but one HTML page have many different Escape Sequence, I can not write many replace statement,like:

str = str.replace(' ', ' ')

...............many code.........

str = str.replace('&lt;', '<')
str = str.replace('&gt;', '>')

It is so long....I just want to have a fun or def, that can make the problem easily. Thank you very much

Answer 1

Use HTMLParser.HTMLParser :

>>> from HTMLParser import HTMLParser
>>> # from html.parser import HTMLParser # In Python 3.x
>>> 
>>> parser = HTMLParser()
>>> parser.unescape('>_<')
u'>_<'
>>> parser.unescape('&#48;&#49;&#x32;')
u'012'

NOTE : HTMLParser.unescape(' ') returns NO-BREAK SPACE (U+00A0) instead of SPACE.

>>> parser.unescape(' ')
u'\xa0'

BTW, Don't use str as a variable name, it shadows a builtin function str .