lxml - The Python XML Toolkit July 2016

lxml@python.org

7 participants
12 discussions

[lxml-dev] Checking whether a node is a comment/element
by Geoffrey Sneddon 11 Jan '23

11 Jan '23

Hi, What's the best way to check whether a given node is a comment or an element? For the former, I'm currently using isinstance(node, etree._Comment), which is rather obviously sub-optimal. -- Geoffrey Sneddon <http://gsnedders.com/>

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[lxml-dev] lxml 2.0.5 released
by Stefan Behnel 11 Jan '23

11 Jan '23

Hi all, lxml 2.0.5 is on PyPI. This is a bug-fix-only release of the stable 2.0 series. Have fun, Stefan 2.0.5 (2008-05-01) Bugs fixed * Resolving to a filename in custom resolvers didn't work. * lxml did not honour libxslt's second error state "STOPPED", which let some XSLT errors pass silently. * Memory leak in Schematron with libxml2 >= 2.6.31.

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[lxml-dev] lxml has its page on launchpad
by Stefan Behnel 21 Sep '22

21 Sep '22

Hi all, I added the lxml project to launchpad, the Ubuntu Bug-Tracker. It also has a FAQ engine and a couple of other goodies. https://launchpad.net/lxml It's easy to sign up for launchpad, BTW, no 90%-footnotes-contract. Have fun, Stefan

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[lxml-dev] Building LXML Trunk
by Sidnei da Silva 31 Aug '22

31 Aug '22

Hi, I've tried to build lxml from trunk today, on Win32. Got the following error: src\lxml\etree.c(880) : error C2059: syntax error : ')' src\lxml\etree.c(881) : error C2059: syntax error : ')' src\lxml\etree.c(882) : error C2059: syntax error : ')' src\lxml\etree.c(883) : error C2059: syntax error : ')' Any clue? Smells like a Pyrex issue? -- Sidnei da Silva Enfold Systems http://enfoldsystems.com Fax +1 832 201 8856 Office +1 713 942 2377 Ext 214

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htmlfile doesn't escape attribute values
by Burak Arslan 27 Dec '16

27 Dec '16

Hello, This is a heads-up for bug 1594155 here: https://bugs.launchpad.net/lxml/+bug/1594155 Please consider the following test case. >>> from lxml import html >>> from lxml.etree import htmlfile >>> from lxml.html.builder import E >>> from StringIO import StringIO >>> out = StringIO() >>> with htmlfile(out) as f: ... with f.element("tagname", attrib={"attr": '"misquoted"'}): ... f.write("foo") ... >>> out.getvalue() '<tagname attr=""misquoted"">foo</tagname>' Expected output: '<tagname attr=""misquoted"">foo</tagname>' Lack of proper escaping confuses the hell out of browsers :) Proper escaping is needed to safely put html documents inside srcdoc attribute of an <iframe>. The workaround is to quote the data before putting it inside an attribute. Fortunately, only replacing " with " is enough and & is also not escaped (but it should be). versions: Python : sys.version_info(major=2, minor=7, micro=11, releaselevel='final', serial=0) lxml.etree : (3, 6, 0, 0) libxml used : (2, 9, 3) libxml compiled : (2, 9, 3) libxslt used : (1, 1, 28) libxslt compiled : (1, 1, 28) Best regards, Burak

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Distinguishing errors caused by <xsl:message terminate="yes"> in XSL templates
by Konstantin Khomoutov 25 Jul '16

25 Jul '16

Hi! (Please Cc me as I'm not subscribed.) I'm using Python 3.4 with lxml 3.4.0. When I forcibly terminate processing of an XSL template using the <xsl:message terminate="yes">...</xsl:message> which results in an instance of the lxml.etree.XSLTApplyError exception being thrown. I'd like to differentiate between "hard" processing erros which might occur during XSLT processing and "soft" errors -- detected by the template logic and reported using <xsl:message> but it seems that the exception type provides no special fields / methods to make such differentiation possible. So the question: is it possible to differentiate XSLT application errors generated by <xsl:message terminate="yes"> from the other errors? Or should I resort to insetring textual prefixes to the messages I'm using -- to check againt them in the exception handling code?

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lxml 3.6.1 released
by Stefan Behnel 24 Jul '16

24 Jul '16

Hi all, I just released lxml 3.6.1 with mostly bug fixes. Most changes in this release came from pull requests. Thanks to everyone who contributed. The documentation is here: http://lxml.de/ Download: http://lxml.de/files/lxml-3.6.1.tgz Signature: http://lxml.de/files/lxml-3.6.1.tgz.asc Changelog: http://lxml.de/3.6/changes-3.6.1.html Github: https://github.com/lxml/lxml/commit/2fae19478d87dfdcaed23ed63b7f64b2ab8c0dc7 This release was built using Cython 0.23.5. If you are interested in commercial support or customisations for the lxml package, please contact me directly. Have fun, Stefan 3.6.1 (2016-07-24) ================== Features added -------------- * GH#180: Separate option ``inline_style`` for Cleaner that only removes ``style`` attributes instead of all styles. Patch by Christian Pedersen. * GH#196: Windows build support for Python 3.5. Contribution by Maximilian Hils. Bugs fixed ---------- * GH#199: Exclude ``file`` fields from ``FormElement.form_values`` (as browsers do). Patch by Tomas Divis. * GH#198, LP#1568167: Try to provide base URL from ``Resolver.resolve_string()``. Patch by Michael van Tellingen. * GH#191: More accurate float serialisation in ``objectify.FloatElement``. Patch by Holger Joukl. * LP#1551797: Repair XSLT error logging. Patch by Marcus Brinkmann.

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Windows wheel for Python 3.5
by Stefan Behnel 24 Jul '16

24 Jul '16

Hi all! Maximilian Hils contributed a 32bits Windows wheel of lxml 3.6 for Python 3.5. Could other interested people please test it before I upload it to PyPI? It's built via appveyor using this configuration: https://github.com/mhils/lxml/blob/master/.appveyor.yml and these versions of libxml2 etc.: https://github.com/mhils/libxml2-win-binaries Stefan

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Building lxml on windows with self-built libxml2 and libxslt
by Dennis 22 Jul '16

22 Jul '16

Hi, I have a build script (python) that builds libxml2 and libxslt for me on windows. I wanted to add lxml to this however I can't find out how to add the paths of these self-built libs to the lxml build. So I have: sources\libxml2-2.7.8 sources\libxslt-1.1.26 and built\libxml2-2.7.8 built\libxslt-1.1.26 and from sources\lxml-lxml-3.6.0 I would like to build, using the already-built libxml and libxslt (on windows..) however using 'python setup.py install' gives the following output: ... Building without Cython. ERROR: 'xslt-config' is not recognized as an internal or external command, operable program or batch file. ... ... xmlXPathInitdjji7e.c(1) : fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory ************************************************************************ ********* Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed? ************************************************************************ ********* Can this library be built with self-built versions of libxml and libxslt or are those dev packages a hard requirement? Thanks in advance

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Getting an xpath from an etree.DocumentInvalid exception
by Dale Potter 19 Jul '16

19 Jul '16

Hello, I'm using lxml to build a validation website for an XML schema. When a file does not meet a schema, I would like to give users the xpath or a snippet of their input XML to show the error. Therefore, I'm trying to work out how to get an xpath to a problem XML element/attribute - i.e. when a etree.DocumentInvalid exception is raised. The approach that I have thought about is to build a mapping of all xpaths to line numbers, and then get find the nearest line to DocumentInvalid.error_log.last_error.line However, a) this feels a bit hacky and b) this won't work for minified files. Is there a better way? Many thanks, and look forward to hearing any thoughts! Dale

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lxml - The Python XML Toolkit July 2016