class CSSSelector(etree.XPath): (source)
A CSS selector. Usage:: >>> from lxml import etree, cssselect >>> select = cssselect.CSSSelector("a tag > child") >>> root = etree.XML("<a><b><c/><tag><child>TEXT</child></tag></b></a>") >>> [ el.tag for el in select(root) ] ['child'] To use CSS namespaces, you need to pass a prefix-to-namespace mapping as ``namespaces`` keyword argument:: >>> rdfns = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#' >>> select_ns = cssselect.CSSSelector('root > rdf|Description', ... namespaces={'rdf': rdfns}) >>> rdf = etree.XML(( ... '<root xmlns:rdf="%s">' ... '<rdf:Description>blah</rdf:Description>' ... '</root>') % rdfns) >>> [(el.tag, el.text) for el in select_ns(rdf)] [('{http://www.w3.org/1999/02/22-rdf-syntax-ns#}Description', 'blah')]