Mailman 3 December 2010 - lxml - The Python XML Toolkit

[lxml-dev] lxml has its page on launchpad
by Stefan Behnel April 11, 2023

April 11, 2023

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] Checking whether a node is a comment/element
by Geoffrey Sneddon April 10, 2023

April 10, 2023

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] Reparenting a node
by Lawrence Oluyede Jan. 30, 2023

Jan. 30, 2023

I have a doc A and a doc B, I'd like to put a node extracted from A in the document B but I always get a ValueError: ValueError: Element is not a child of this node. I didn't find any "setparent" in the API. How can I do this? -- Lawrence, oluyede.org - neropercaso.it "It is difficult to get a man to understand something when his salary depends on not understanding it" - Upton Sinclair

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[lxml-dev] lxml 2.0.5 released
by Stefan Behnel Jan. 11, 2023

Jan. 11, 2023

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] Building LXML Trunk
by Sidnei da Silva Aug. 31, 2022

Aug. 31, 2022

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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[lxml-dev] confusing xpath performance characteristics
by jholg＠gmx.de Aug. 24, 2012

Aug. 24, 2012

Hi, I ran into some performance characteristics of lxml/libxml2 xpath that I find rather confusing: I try to find the @type attribute of a certain element in an XML Schema (which contains lots of complexType definitions with lots of elements in them; unfortunately I can't post the schema): >>> timeit.Timer(stmt="""xpath(schema)""", setup="""from lxml import etree, objectify; schema=etree.parse('NDM.xsd').getroot(); xpath = etree.XPath('//xs:element[@name="equity"]/@type', namespaces=… [View More]

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[lxml-dev] DLL issue with win32 static builds of lxml
by Scott Smith April 4, 2011

April 4, 2011

Hi I'm looking at upgrading our python installations from 2.6(.2) to 2.7 and upgrading the packages we use to the latest versions. We use python and the mod_wsgi module in Apache 2.2 for our application server and easy_install to install egg packages. I'm currently testing on a Windows 7 machine. The current egg version of lxml that we're using (before upgrading) is: lxml-2.2.4-py2.6-win32.egg In trying to upgrade things, I've found that all the later builds of lxml cause a DLL problem … [View More]

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Re: [lxml-dev] lxml-dev Digest, Vol 75, Issue 1
by Dimitrios Pritsos Jan. 6, 2011

Jan. 6, 2011

Hello guys, I am sorry that I am sending this as a response but there is two issues I d like to point out: 1. There is a memory leakage using lxml.html.parse (or etree) while you do that constantly in a loop. In particular creating etrees in a loop does let the trees there and is not deleting the properly when you reuse the same python variable to store the resutls. For now I haven't tryed to resolve it because module re (regular expression) is just fine for URL extraction, however I … [View More]would prefer the use of XPath for extracting a variate of links more easily in Coding point of view. Plus I think that the overhead of Tree Building is not so much (I dont know for sure thought). 2. Speaking of XPath for url extraction, I think that lxml.html has some issues in url extraction (this is what I think reading the Code of this module). And the question is why not to use the XPath for making the code twice smaller and twice neater (I cleaner and well formed - I hope my vocabulary is correct), maybe faster too. Best Regards, Dimitrios On 12/02/2010 11:35 AM, lxml-dev-request(a)codespeak.net wrote: > Send lxml-dev mailing list submissions to > lxml-dev(a)codespeak.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://codespeak.net/mailman/listinfo/lxml-dev > or, via email, send a message with subject or body 'help' to > lxml-dev-request(a)codespeak.net > > You can reach the person managing the list at > lxml-dev-owner(a)codespeak.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of lxml-dev digest..." > > > Today's Topics: > > 1. Re: Compile failure (felix) > 2. Re: Compile failure (jholg(a)gmx.de) > 3. Re: SyntaxErrors with Python 3 (Stefan Behnel) > 4. Re: Schema validation - no file position (Stefan Behnel) > 5. Re: Schema validation - no file position (Krzysztof Jakubczyk) > 6. Re: Schema validation - no file position (Stefan Behnel) > 7. Re: read .xlsx spreadsheets with lxml ? (Chris Withers) > 8. How to register extension functions for XSL transformations > (Shaung) > 9. Re: How to register extension functions for XSL > transformations (jholg(a)gmx.de) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 23 Nov 2010 11:14:19 +0100 > From: felix<crucialfelix(a)gmail.com> > Subject: Re: [lxml-dev] Compile failure > To: Stefan Behnel<stefan_ml(a)behnel.de> > Cc: lxml-dev(a)codespeak.net > Message-ID: > <AANLkTinBaMukcy=pCVHjmmmAq=kiPN=nGE_Gd27_z5sT(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > On Sat, Oct 30, 2010 at 10:49 AM, Stefan Behnel<stefan_ml(a)behnel.de> wrote: > >> felix, 26.10.2010 15:28: >> >> According to this: >>> http://codespeak.net/lxml/build.html >>> >>> we should avoid installing Cython >>> >>> but using easy_install to build fails saying the cython generated file is >>> missing >>> >> I doubt that it's failing because of that. However, you didn't provide the >> output of the build, so I can't guess what happened that actually made the >> build fail. > > sorry, that output had scrolled off by the time I realized I should submit a > report. I have another server so fortunately I can fail there and show you. > > crucial@crucial-systems:~/working/lxml$ python setup.py build > /home/crucial/working/lxml/versioninfo.py:53: UserWarning: unrecognized > .svn/entries format; skipping /home/crucial/working/lxml/ > warn("unrecognized .svn/entries format; skipping "+base) > Building lxml version 2.3.beta1. > *NOTE: Trying to build without Cython, pre-generated 'src/lxml/lxml.etree.c' > needs to be available.* > Using build configuration of libxslt 1.1.26 > Building against libxml2/libxslt in the following directory: /usr/lib > running build > running build_py > running build_ext > building 'lxml.etree' extension > gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall > -Wstrict-prototypes -fPIC -I/usr/local/include/libxml2 > -I/usr/include/python2.6 -c src/lxml/lxml.etree.c -o > build/temp.linux-x86_64-2.6/src/lxml/lxml.etree.o -w > gcc: src/lxml/lxml.etree.c: No such file or directory > gcc: no input files > error: command 'gcc' failed with exit status 1 > > > >> The latest build instructions for the SVN trunk are in the SVN trunk as >> "doc/build.txt", or *(not always completely up-to-date)* here: >> > exactly > > > > >> *but then I succeeded with the old sudo easy_install lxml* >>> >>> because now I have Cython >>> >> Again, I doubt that this is the reason. >> > sudo easy_install lxml > failed before > > after installing Cython it says it uses Cython (not Trying to build without > Cython) and it worked. > > nothing else having changed I thought it was a reasonable guess that it > worked because it used Cython because Cython is installed. > > * > * > >> Stefan >> > [View Less]

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[lxml-dev] no error position or line number when walidating against XMLSchema using iterparse
by Grzegorz Ślusarek Dec. 30, 2010

Dec. 30, 2010

Hello I'm trying to use iterparse to validate big xml document using XmlSchema. Generally it works, but when walidate malformed xml, the exception received doesn't contain any information about file position. Specific Exception attributes like position is (0,0), offset is None and linenumber is just None. In that case is very hard say what's wrong with xml, especially when is'a big xml file (300 MB). Is it a bug or this is correct behaviour ? I found that this question was allready asked … [View More]

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[lxml-dev] xpath: retrieve attribute names
by jholg＠gmx.de Dec. 29, 2010

Dec. 29, 2010

Hi, is there a convenient way to retrieve element attribute values and *names* using xpath? I haven't yet found an XPath (1.0) expression and believe this is impossible in XPath 1.0. It is of course trivial to get at the attribute values: >>> print etree.__version__ 2.2.6 >>> print etree.LIBXML_VERSION (2, 6, 32) >>> print etree.LIBXSLT_VERSION (1, 1, 23) >>> >>> root = objectify.Element('root') >>> root.a = 3 >>> root.a.set('… [View More]

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