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Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.

Project description

lxml is a Pythonic, mature binding for the libxml2 and libxslt libraries. It provides safe and convenient access to these libraries using the ElementTree API.

It extends the ElementTree API significantly to offer support for XPath, RelaxNG, XML Schema, XSLT, C14N and much more.

To contact the project, go to the project home page or see our bug tracker at

In case you want to use the current in-development version of lxml, you can get it from the github repository at . Note that this requires Cython to build the sources, see the build instructions on the project home page. To the same end, running easy_install lxml==dev will install lxml from if you have an appropriate version of Cython installed.

After an official release of a new stable series, bug fixes may become available at . Running easy_install lxml==3.7bugfix will install the unreleased branch state from as soon as a maintenance branch has been established. Note that this requires Cython to be installed at an appropriate version for the build.

3.7.0 (2016-12-10)

Features added

  • GH#217: XMLSyntaxError now behaves more like its SyntaxError baseclass. Patch by Philipp A.

  • GH#216: HTMLParser() now supports the same collect_ids parameter as XMLParser(). Patch by Burak Arslan.

  • GH#210: Allow specifying a serialisation method in xmlfile.write(). Patch by Burak Arslan.

  • GH#203: New option default_doctype in HTMLParser that allows disabling the automatic doctype creation. Patch by Shadab Zafar.

  • GH#201: Calling the method .set('attrname') without value argument (or None) on HTML elements creates an attribute without value that serialises like <div attrname></div>. Patch by Daniel Holth.

  • GH#197: Ignore form input fields in form_values() when they are marked as disabled in HTML. Patch by Kristian Klemon.

Bugs fixed

  • GH#206: File name and line number were missing from XSLT error messages. Patch by Marcus Brinkmann.

Other changes

  • Log entries no longer allow anything but plain string objects as message text and file name.

  • zlib is included in the list of statically built libraries.

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