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class="menu item"><a href="lxml-source-howto.html#where-to-start">Where to start?</a></li><li class="menu item"><a href="lxml-source-howto.html#lxml-etree">lxml.etree</a></li><li class="menu item"><a href="lxml-source-howto.html#python-modules">Python modules</a></li><li class="menu item"><a href="lxml-source-howto.html#lxml-objectify">lxml.objectify</a></li><li class="menu item"><a href="lxml-source-howto.html#lxml-html">lxml.html</a></li></ul></li></ul><ul class="menu foreign" id="changes 4 2 5-menu"><li class="menu title"><a href="changes-4.2.5.html">Release Changelog</a></li></ul><ul class="menu foreign" id="credits-menu"><li class="menu title"><a href="credits.html">Credits</a><ul class="submenu"><li class="menu item"><a href="credits.html#main-contributors">Main contributors</a></li><li class="menu item"><a href="credits.html#special-thanks-goes-to">Special thanks goes to:</a></li></ul></li></ul></li><li><a href="/sitemap.html">Sitemap</a></li></ul></div></div><h1 class="title">lxml - XML and HTML with Python</h1>
<div class="pagequote line-block">
<div class="line"><a class="reference external" href="http://thread.gmane.org/gmane.comp.python.lxml.devel/3252/focus=3258">» lxml takes all the pain out of XML. «</a></div>
<div class="line">Stephan Richter</div>
</div>
<p class="eyecatcher">lxml is the most feature-rich
and easy-to-use library
for processing XML and HTML
in the Python language.</p>
<div class="section" id="introduction">
<h1>Introduction</h1>
<p>The lxml XML toolkit is a Pythonic binding for the C libraries
<a class="reference external" href="http://xmlsoft.org/">libxml2</a> and <a class="reference external" href="http://xmlsoft.org/XSLT/">libxslt</a>. It is unique in that it combines the speed and
XML feature completeness of these libraries with the simplicity of a
native Python API, mostly compatible but superior to the well-known
<a class="reference external" href="http://effbot.org/zone/element-index.htm">ElementTree</a> API. The latest release works with all CPython versions
from 2.6 to 3.6. See the <a class="reference external" href="intro.html">introduction</a> for more information about
background and goals of the lxml project. Some common questions are
answered in the <a class="reference external" href="FAQ.html">FAQ</a>.</p>
<div class="section" id="support-the-project">
<h1>Support the project</h1>
<p>lxml has been downloaded from the <a class="reference external" href="https://pypi.python.org/pypi/lxml">Python Package Index</a>
millions of times and is also available directly in many package
distributions, e.g. for Linux or MacOS-X.</p>
<p>Most people who use lxml do so because they like using it.
You can show us that you like it by blogging about your experience
with it and linking to the project website.</p>
<p>If you are using lxml for your work and feel like giving a bit of
your own benefit back to support the project, consider sending us
money through PayPal that we can use for fixing bugs in the software
and improving its features and documentation. Please read the Legal
Notice below, at the bottom of this page. Thank you for your support.</p>
<p class="center"><a class="reference external" href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=R56JE3VCPDA9N"><img alt="Donate to the lxml project" src="https://lxml.de/paypal_btn_donateCC_LG.png" style="width: 160px; height: 47px;" /></a></p>
<p>Please <a class="reference external" href="http://consulting.behnel.de/">contact Stefan Behnel</a>
for other ways to support the lxml project,
as well as commercial consulting, customisations and trainings on lxml and
fast Python XML processing.</p>
<p><a class="reference external" href="https://travis-ci.org/">Travis-CI</a> and <a class="reference external" href="https://www.appveyor.com/">AppVeyor</a>
support the lxml project with their build and CI servers.
Jetbrains supports the lxml project by donating free licenses of their
<a class="reference external" href="https://www.jetbrains.com/pycharm/">PyCharm IDE</a>.</p>
</div>
</div>
<div class="section" id="documentation">
<h1>Documentation</h1>
<p>The complete lxml documentation is available for download as <a class="reference external" href="lxmldoc-4.2.5.pdf">PDF
documentation</a>. The HTML documentation from this web site is part of
the normal <a class="reference external" href="#download">source download</a>.</p>
<ul class="simple">
<li>Tutorials:<ul>
<li>the <a class="reference external" href="tutorial.html">lxml.etree tutorial for XML processing</a></li>
<li>John Shipman's tutorial on <a class="reference external" href="http://www.nmt.edu/tcc/help/pubs/pylxml/">Python XML processing with lxml</a></li>
<li>Fredrik Lundh's <a class="reference external" href="http://effbot.org/zone/element.htm">tutorial for ElementTree</a></li>
</ul>
</li>
<li>ElementTree:<ul>
<li><a class="reference external" href="http://effbot.org/zone/element-index.htm#documentation">ElementTree API</a></li>
<li><a class="reference external" href="compatibility.html">compatibility</a> and differences of lxml.etree</li>
<li><a class="reference external" href="performance.html">ElementTree performance</a> characteristics and comparison</li>
</ul>
</li>
<li>lxml.etree:<ul>
<li><a class="reference external" href="api.html">lxml.etree specific API</a> documentation</li>
<li>the <a class="reference external" href="api/index.html">generated API documentation</a> as a reference</li>
<li><a class="reference external" href="parsing.html">parsing</a> and <a class="reference external" href="validation.html">validating</a> XML</li>
<li><a class="reference external" href="xpathxslt.html">XPath and XSLT</a> support</li>
<li>Python <a class="reference external" href="extensions.html">XPath extension functions</a> for XPath and XSLT</li>
<li><a class="reference external" href="element_classes.html">custom XML element classes</a> for custom XML APIs (see <a class="reference external" href="s5/lxml-ep2008.html">EuroPython 2008 talk</a>)</li>
<li>a <a class="reference external" href="sax.html">SAX compliant API</a> for interfacing with other XML tools</li>
<li>a <a class="reference external" href="capi.html">C-level API</a> for interfacing with external C/Cython modules</li>
</ul>
</li>
<li>lxml.objectify:<ul>
<li><a class="reference external" href="objectify.html">lxml.objectify</a> API documentation</li>
<li>a brief comparison of <a class="reference external" href="FAQ.html#what-is-the-difference-between-lxml-etree-and-lxml-objectify">objectify and etree</a></li>
</ul>
</li>
</ul>
<p>lxml.etree follows the <a class="reference external" href="http://effbot.org/zone/element-index.htm">ElementTree</a> API as much as possible, building
it on top of the native libxml2 tree. If you are new to ElementTree,
start with the <a class="reference external" href="tutorial.html">lxml.etree tutorial for XML processing</a>. See also the
ElementTree <a class="reference external" href="compatibility.html">compatibility</a> overview and the <a class="reference external" href="performance.html">ElementTree performance</a>
page comparing lxml to the original <a class="reference external" href="http://effbot.org/zone/element-index.htm">ElementTree</a> and <a class="reference external" href="http://effbot.org/zone/celementtree.htm">cElementTree</a>
implementations.</p>
<p>Right after the <a class="reference external" href="tutorial.html">lxml.etree tutorial for XML processing</a> and the
<a class="reference external" href="http://effbot.org/zone/element-index.htm">ElementTree</a> documentation, the next place to look is the <a class="reference external" href="api.html">lxml.etree
specific API</a> documentation. It describes how lxml extends the
ElementTree API to expose libxml2 and libxslt specific XML
functionality, such as <a class="reference external" href="http://www.w3.org/TR/xpath/">XPath</a>, <a class="reference external" href="http://www.relaxng.org/">Relax NG</a>, <a class="reference external" href="http://www.w3.org/XML/Schema">XML Schema</a>, <a class="reference external" href="http://www.w3.org/TR/xslt">XSLT</a>, and
<a class="reference external" href="http://www.w3.org/TR/xml-c14n">c14n</a>. Python code can be called from XPath expressions and XSLT
stylesheets through the use of <a class="reference external" href="extensions.html">XPath extension functions</a>. lxml
also offers a <a class="reference external" href="sax.html">SAX compliant API</a>, that works with the SAX support in
the standard library.</p>
<p>There is a separate module <a class="reference external" href="objectify.html">lxml.objectify</a> that implements a data-binding
API on top of lxml.etree. See the <a class="reference external" href="FAQ.html#what-is-the-difference-between-lxml-etree-and-lxml-objectify">objectify and etree</a> FAQ entry for a
comparison.</p>
<p>In addition to the ElementTree API, lxml also features a sophisticated
API for <a class="reference external" href="element_classes.html">custom XML element classes</a>. This is a simple way to write
arbitrary XML driven APIs on top of lxml. lxml.etree also has a
<a class="reference external" href="capi.html">C-level API</a> that can be used to efficiently extend lxml.etree in
external C modules, including fast custom element class support.</p>
</div>
<div class="section" id="download">
<h1>Download</h1>
<p>The best way to download lxml is to visit <a class="reference external" href="http://pypi.python.org/pypi/lxml/">lxml at the Python Package
Index</a> (PyPI). It has the source
that compiles on various platforms. The source distribution is signed
with <a class="reference external" href="pubkey.asc">this key</a>.</p>
<p>The latest version is <a class="reference external" href="/files/lxml-4.2.5.tgz">lxml 4.2.5</a>, released 2018-09-09
(<a class="reference external" href="/changes-4.2.5.html">changes for 4.2.5</a>). <a class="reference external" href="#old-versions">Older versions</a>
are listed below.</p>
<p>Please take a look at the
<a class="reference external" href="installation.html">installation instructions</a> !</p>
<p>This complete web site (including the generated API documentation) is
part of the source distribution, so if you want to download the
documentation for offline use, take the source archive and copy the
<tt class="docutils literal">doc/html</tt> directory out of the source tree, or use the
<a class="reference external" href="lxmldoc-4.2.5.pdf">PDF documentation</a>.</p>
<p>The latest <a class="reference external" href="https://github.com/lxml/lxml/archive/master.zip">installable developer sources</a>
are available from Github. It's also possible to check out
the latest development version of lxml from Github directly, using a command
like this (assuming you use hg and have hg-git installed):</p>
<pre class="literal-block">
hg clone git+ssh://git@github.com/lxml/lxml.git lxml
</pre>
<p>Alternatively, if you use git, this should work as well:</p>
<pre class="literal-block">
git clone https://github.com/lxml/lxml.git lxml
</pre>
<p>You can browse the <a class="reference external" href="https://github.com/lxml/lxml/">source repository</a> and its history through
the web. Please read <a class="reference external" href="build.html">how to build lxml from source</a>
first. The <a class="reference external" href="https://github.com/lxml/lxml/blob/master/CHANGES.txt">latest CHANGES</a> of the developer version are also
accessible. You can check there if a bug you found has been fixed
or a feature you want has been implemented in the latest trunk version.</p>
</div>
<div class="section" id="mailing-list">
<h1>Mailing list</h1>
<p>Questions? Suggestions? Code to contribute? We have a <a class="reference external" href="http://lxml.de/mailinglist/">mailing list</a>.</p>
<p>You can search the archive with <a class="reference external" href="http://blog.gmane.org/gmane.comp.python.lxml.devel">Gmane</a> or <a class="reference external" href="http://www.google.com/webhp?q=site:comments.gmane.org%2Fgmane.comp.python.lxml.devel+">Google</a>.</p>
</div>
<div class="section" id="bug-tracker">
<h1>Bug tracker</h1>
<p>lxml uses the <a class="reference external" href="https://launchpad.net/lxml/">launchpad bug tracker</a>. If you are sure you found a
bug in lxml, please file a bug report there. If you are not sure
whether some unexpected behaviour of lxml is a bug or not, please
check the documentation and ask on the <a class="reference external" href="http://lxml.de/mailinglist/">mailing list</a> first. Do not
forget to search the archive (e.g. with <a class="reference external" href="http://blog.gmane.org/gmane.comp.python.lxml.devel">Gmane</a>)!</p>
</div>
<div class="section" id="license">
<h1>License</h1>
<p>The lxml library is shipped under a <a class="reference external" href="https://github.com/lxml/lxml/blob/master/doc/licenses/BSD.txt">BSD license</a>. libxml2 and libxslt2
itself are shipped under the <a class="reference external" href="http://www.opensource.org/licenses/mit-license.html">MIT license</a>. There should therefore be no
obstacle to using lxml in your codebase.</p>
</div>
<div class="section" id="old-versions">
<h1>Old Versions</h1>
<p>See the websites of lxml
<a class="reference external" href="http://lxml.de/1.3/">1.3</a>,
<a class="reference external" href="http://lxml.de/2.0/">2.0</a>,
<a class="reference external" href="http://lxml.de/2.1/">2.1</a>,
<a class="reference external" href="http://lxml.de/2.2/">2.2</a>,
<a class="reference external" href="http://lxml.de/2.3/">2.3</a>,
<a class="reference external" href="http://lxml.de/3.0/">3.0</a>,
<a class="reference external" href="http://lxml.de/3.1/">3.1</a>,
<a class="reference external" href="http://lxml.de/3.2/">3.2</a>,
<a class="reference external" href="http://lxml.de/3.3/">3.3</a>,
<a class="reference external" href="http://lxml.de/3.4/">3.4</a>,
<a class="reference external" href="http://lxml.de/3.5/">3.5</a>,
<a class="reference external" href="http://lxml.de/3.6/">3.6</a>,
<a class="reference external" href="http://lxml.de/3.7/">3.7</a>,
<a class="reference external" href="http://lxml.de/3.8/">3.8</a>,
<a class="reference external" href="http://lxml.de/4.0/">4.0</a>
<a class="reference external" href="http://lxml.de/4.1/">4.1</a></p>
<ul class="simple">
<li><a class="reference external" href="/files/lxml-4.2.5.tgz">lxml 4.2.5</a>, released 2018-09-09 (<a class="reference external" href="/changes-4.2.5.html">changes for 4.2.5</a>)</li>
<li><a class="reference external" href="/files/lxml-4.2.4.tgz">lxml 4.2.4</a>, released 2018-08-03 (<a class="reference external" href="/changes-4.2.4.html">changes for 4.2.4</a>)</li>
<li><a class="reference external" href="/files/lxml-4.2.3.tgz">lxml 4.2.3</a>, released 2018-06-27 (<a class="reference external" href="/changes-4.2.3.html">changes for 4.2.3</a>)</li>
<li><a class="reference external" href="/files/lxml-4.2.2.tgz">lxml 4.2.2</a>, released 2018-06-22 (<a class="reference external" href="/changes-4.2.2.html">changes for 4.2.2</a>)</li>
<li><a class="reference external" href="/files/lxml-4.2.1.tgz">lxml 4.2.1</a>, released 2018-03-21 (<a class="reference external" href="/changes-4.2.1.html">changes for 4.2.1</a>)</li>
<li><a class="reference external" href="/files/lxml-4.2.0.tgz">lxml 4.2.0</a>, released 2018-03-13 (<a class="reference external" href="/changes-4.2.0.html">changes for 4.2.0</a>)</li>
<li><a class="reference external" href="/files/lxml-4.1.1.tgz">lxml 4.1.1</a>, released 2017-11-04 (<a class="reference external" href="/changes-4.1.1.html">changes for 4.1.1</a>)</li>
<li><a class="reference external" href="/files/lxml-4.1.0.tgz">lxml 4.1.0</a>, released 2017-10-13 (<a class="reference external" href="/changes-4.1.0.html">changes for 4.1.0</a>)</li>
<li><a class="reference external" href="/files/lxml-4.0.0.tgz">lxml 4.0.0</a>, released 2017-09-17 (<a class="reference external" href="/changes-4.0.0.html">changes for 4.0.0</a>)</li>
<li><a class="reference external" href="/files/lxml-3.8.0.tgz">lxml 3.8.0</a>, released 2017-06-03 (<a class="reference external" href="/changes-3.8.0.html">changes for 3.8.0</a>)</li>
<li><a class="reference external" href="http://lxml.de/3.7/#old-versions">older releases</a></li>
</ul>
</div><div class="section" id="legal-notice-for-donations">
<h1>Legal Notice for Donations</h1>
<p>Any donation that you make to the lxml project is voluntary and
is not a fee for any services, goods, or advantages. By making
a donation to the lxml project, you acknowledge that we have the
right to use the money you donate in any lawful way and for any
lawful purpose we see fit and we are not obligated to disclose
the way and purpose to any party unless required by applicable
law. Although lxml is free software, to the best of our knowledge
the lxml project does not have any tax exempt status. The lxml
project is neither a registered non-profit corporation nor a
registered charity in any country. Your donation may or may not
be tax-deductible; please consult your tax advisor in this matter.
We will not publish or disclose your name and/or e-mail address
without your consent, unless required by applicable law. Your
donation is non-refundable.</p>
</div>
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Generated on: 2018-09-09.
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