tinycss is a complete yet simple CSS parser for Python.  It supports the
full syntax and error handling for CSS 2.1 as well as some CSS 3 modules:

-- CSS Color 3
-- CSS Fonts 3
-- CSS Paged Media 3

It is designed to be easy to extend for new CSS modules and syntax, and
integrates well with cssselect for Selectors 3 support.

WWW: https://pypi.org/project/tinycss/