lxml is a Pythonic binding for the libxml2 and libxslt libraries. It
follows the ElementTree API as much as possible, building it on top of
the native libxml2 tree. It also extends this API to expose libxml2 and
libxslt specific functionality, such as XPath, Relax NG, XML Schema,
XSLT, and c14n.

Author:
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Stefan Behnel - main developer and maintainer
Martijn Faassen - creator of lxml and initial main developer
and others