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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="generator" content="Docutils 0.4.1: http://docutils.sourceforge.net/" /> <title>Installing lxml</title> <link rel="stylesheet" href="style.css" type="text/css" /> </head> <body> <div class="document" id="installing-lxml"> <div class="sidemenu"><ul id="lxml"><li><span class="section title">lxml</span><ul class="menu foreign" id="index"><li class="menu title"><a href="index.html">lxml</a><ul class="submenu"><li class="menu item"><a href="index.html#introduction">Introduction</a></li><li class="menu item"><a href="index.html#documentation">Documentation</a></li><li class="menu item"><a href="index.html#download">Download</a></li><li class="menu item"><a href="index.html#mailing-list">Mailing list</a></li><li 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href="installation.html#macos-x">MacOS-X</a></li></ul></li></ul><ul class="menu foreign" id="lxml2"><li class="menu title"><a href="lxml2.html">What's new in lxml 2.0?</a><ul class="submenu"><li class="menu item"><a href="lxml2.html#changes-in-etree-and-objectify">Changes in etree and objectify</a></li><li class="menu item"><a href="lxml2.html#new-modules">New modules</a></li></ul></li></ul><ul class="menu foreign" id="performance"><li class="menu title"><a href="performance.html">Benchmarks and Speed</a><ul class="submenu"><li class="menu item"><a href="performance.html#general-notes">General notes</a></li><li class="menu item"><a href="performance.html#how-to-read-the-timings">How to read the timings</a></li><li class="menu item"><a href="performance.html#parsing-and-serialising">Parsing and Serialising</a></li><li class="menu item"><a href="performance.html#the-elementtree-api">The ElementTree API</a></li><li class="menu item"><a href="performance.html#xpath">XPath</a></li><li 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href="FAQ.html#xpath-and-document-traversal">XPath and Document Traversal</a></li></ul></li></ul></li></ul><ul id="Developing with lxml"><li><span class="section title">Developing with lxml</span><ul class="menu foreign" id="tutorial"><li class="menu title"><a href="tutorial.html">The lxml.etree Tutorial</a><ul class="submenu"><li class="menu item"><a href="tutorial.html#the-element-class">The Element class</a></li><li class="menu item"><a href="tutorial.html#the-elementtree-class">The ElementTree class</a></li><li class="menu item"><a href="tutorial.html#parsing-from-strings-and-files">Parsing from strings and files</a></li><li class="menu item"><a href="tutorial.html#namespaces">Namespaces</a></li><li class="menu item"><a href="tutorial.html#the-e-factory">The E-factory</a></li><li class="menu item"><a href="tutorial.html#elementpath">ElementPath</a></li></ul></li></ul><ul class="menu foreign" id="api index"><li class="menu title"><a href="api/index.html">API 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href="extensions.html#evaluator-local-extensions">Evaluator-local extensions</a></li><li class="menu item"><a href="extensions.html#what-to-return-from-a-function">What to return from a function</a></li></ul></li></ul><ul class="menu foreign" id="element classes"><li class="menu title"><a href="element_classes.html">Using custom Element classes in lxml</a><ul class="submenu"><li class="menu item"><a href="element_classes.html#element-initialization">Element initialization</a></li><li class="menu item"><a href="element_classes.html#setting-up-a-class-lookup-scheme">Setting up a class lookup scheme</a></li><li class="menu item"><a href="element_classes.html#implementing-namespaces">Implementing namespaces</a></li></ul></li></ul><ul class="menu foreign" id="sax"><li class="menu title"><a href="sax.html">Sax support</a><ul class="submenu"><li class="menu item"><a href="sax.html#building-a-tree-from-sax-events">Building a tree from SAX events</a></li><li class="menu item"><a href="sax.html#producing-sax-events-from-an-elementtree-or-element">Producing SAX events from an ElementTree or Element</a></li><li class="menu item"><a href="sax.html#interfacing-with-pulldom-minidom">Interfacing with pulldom/minidom</a></li></ul></li></ul><ul class="menu foreign" id="capi"><li class="menu title"><a href="capi.html">The public C-API of lxml.etree</a><ul class="submenu"><li class="menu item"><a href="capi.html#writing-external-modules-in-cython">Writing external modules in Cython</a></li><li class="menu item"><a href="capi.html#writing-external-modules-in-c">Writing external modules in C</a></li></ul></li></ul></li></ul><ul id="Developing lxml"><li><span class="section title">Developing lxml</span><ul class="menu foreign" id="build"><li class="menu title"><a href="build.html">How to build lxml from source</a><ul class="submenu"><li class="menu item"><a href="build.html#cython">Cython</a></li><li class="menu item"><a href="build.html#subversion">Subversion</a></li><li class="menu item"><a href="build.html#setuptools">Setuptools</a></li><li class="menu item"><a href="build.html#running-the-tests-and-reporting-errors">Running the tests and reporting errors</a></li><li class="menu item"><a href="build.html#contributing-an-egg">Contributing an egg</a></li><li class="menu item"><a href="build.html#providing-newer-library-versions-on-mac-os-x">Providing newer library versions on Mac-OS X</a></li><li class="menu item"><a href="build.html#static-linking-on-windows">Static linking on Windows</a></li><li class="menu item"><a href="build.html#building-debian-packages-from-svn-sources">Building Debian packages from SVN sources</a></li></ul></li></ul><ul class="menu foreign" id="lxml source howto"><li class="menu title"><a href="lxml-source-howto.html">How to read the source of lxml</a><ul class="submenu"><li class="menu item"><a href="lxml-source-howto.html#what-is-cython?">What is Cython?</a></li><li 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-pyclasslookup">lxml.pyclasslookup</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 2 0 11"><li class="menu title"><a href="changes-2.0.11.html">Release Changelog</a></li></ul><ul class="menu foreign" id="credits"><li class="menu title"><a href="credits.html">Credits</a><ul class="submenu"><li class="menu item"><a href="credits.html#special-thanks-goes-to:">Special thanks goes to:</a></li></ul></li></ul></li></ul></div><h1 class="title">Installing lxml</h1> <div class="section"> <h1><a id="requirements" name="requirements">Requirements</a></h1> <p>You need Python 2.3 or later.</p> <p>You need libxml2 and libxslt, in particular:</p> <ul> <li><p class="first">libxml 2.6.20 or later. It can be found here: <a class="reference" href="http://xmlsoft.org/downloads.html">http://xmlsoft.org/downloads.html</a></p> <p>If you want to use XPath, do not use libxml2 2.6.27.</p> </li> <li><p class="first">libxslt 1.1.15 or later. It can be found here: <a class="reference" href="http://xmlsoft.org/XSLT/downloads.html">http://xmlsoft.org/XSLT/downloads.html</a></p> </li> </ul> <p>Newer versions generally contain less bugs and are therefore recommended. The HTML parser benefits from libxml2 version 2.6.21 or later, which support parsing horribly broken HTML. XML Schema support is also still worked on in libxml2, so newer versions will give you better complience with the W3C spec.</p> </div> <div class="section"> <h1><a id="installation" name="installation">Installation</a></h1> <p>If you have <a class="reference" href="http://peak.telecommunity.com/DevCenter/EasyInstall">easy_install</a>, you can run the following as super-user (or administrator):</p> <pre class="literal-block"> easy_install lxml </pre> <p>This has been reported to work on Linux, MacOS-X 10.4 and Windows, as long as libxml2 and libxslt are properly installed (including development packages, i.e. header files, etc.).</p> </div> <div class="section"> <h1><a id="building-lxml-from-sources" name="building-lxml-from-sources">Building lxml from sources</a></h1> <p>If you want to build lxml from SVN you should read <a class="reference" href="build.html">how to build lxml from source</a> (or the file <tt class="docutils literal"><span class="pre">build.txt</span></tt> in the <tt class="docutils literal"><span class="pre">doc</span></tt> directory of the source tree). Building from Subversion sources or from modified distribution sources requires <a class="reference" href="http://www.cython.org">Cython</a> to translate the lxml sources into C code. The source distribution ships with pre-generated C source files, so you do not need Cython installed to build from release sources.</p> <p>If you have read these instructions and still cannot manage to install lxml, you can check the archives of the <a class="reference" href="http://codespeak.net/mailman/listinfo/lxml-dev">mailing list</a> to see if your problem is known or otherwise send a mail to the list.</p> <blockquote> </blockquote> </div> <div class="section"> <h1><a id="ms-windows" name="ms-windows">MS Windows</a></h1> <p>For MS Windows, the <a class="reference" href="http://cheeseshop.python.org/pypi/lxml">binary egg distribution of lxml</a> is statically built against the libraries, i.e. it already includes them. There is no need to install the external libraries if you use an official lxml build from cheeseshop.</p> <p>If you want to upgrade the libraries and/or compile lxml from sources, you should install a <a class="reference" href="http://www.zlatkovic.com/libxml.en.html">binary distribution</a> of libxml2 and libxslt. You need both libxml2 and libxslt, as well as iconv and zlib.</p> </div> <div class="section"> <h1><a id="macos-x" name="macos-x">MacOS-X</a></h1> <p>On MacOS-X 10.4, you can try to use the installed system libraries when you build lxml yourself. However, the library versions on this system are older than the required versions, so you may encounter certain differences in behaviour or even crashes. A number of users reported success with updated libraries (e.g. using <a class="reference" href="http://finkproject.org/">fink</a>), but needed to set the environment variable <tt class="docutils literal"><span class="pre">DYLD_LIBRARY_PATH</span></tt> to the directory where fink keeps the libraries.</p> <p>A MacPort of lxml is available. Try <tt class="docutils literal"><span class="pre">port</span> <span class="pre">install</span> <span class="pre">py25-lxml</span></tt>.</p> </div> </div> <div class="footer"> <hr class="footer" /> Generated on: 2008-12-12. </div> </body> </html>