How to find/replace text in html while preserving html tags/structure

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Use a DOM library, not regular expressions, when dealing with manipulating HTML:

  • lxml: a parser, document, and HTML serializer. Also can use BeautifulSoup and html5lib for parsing.
  • BeautifulSoup: a parser, document, and HTML serializer.
  • html5lib: a parser. It has a serializer.
  • ElementTree: a document object, and XML serializer
  • cElementTree: a document object implemented as a C extension.
  • HTMLParser: a parser.
  • Genshi: includes a parser, document, and HTML serializer.
  • xml.dom.minidom: a document model built into the standard library, which html5lib can parse to.

Stolen from http://blog.ianbicking.org/2008/03/30/python-html-parser-performance/.

Out of these I would recommend lxml, html5lib, and BeautifulSoup.

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