HTML5Lib (Python)

It follows the original WHATWG official HTML5 specification.

The parser is designed to handle all flavours of HTML and parses invalid documents using well-defined error handling rules compatible with the behaviour of major desktop web browsers.

The output is palced inside a tree structure.

It supports output to ElementTree, DOM and lxml tree formats as well as a simple custom format.

HTML5Lib is packaged with distutils.

HTML5Lib is also available in:

Ruby - download HTML5Lib for Ruby here.
Python - download HTML5Lib for Python here.
PHP - download HTML5Lib for PHP here.

What is new in this release:

• Parses valid and invalid HTML documents to a tree
• Support for minidom, ElementTree (including cElementTree and lxml.etree), BeautifulSoup (deprecated) and custom simpletree output formats
• DOM to SAX converter
• Reports parse errors
• Character encoding detection
• Filtering and serializing of trees
• HTML+CSS sanitizer
• Many unit tests