Mailman 3 February 2007 - lxml - The Python XML Toolkit

[lxml-dev] Pickling objectified trees
by Christian Zagrodnick 09 Jun '08

09 Jun '08

Hi, the other day I had to pickle objectified trees. I just thought to share my findings. Pickling is about serialization. IMHO the natural serialization of an objectified tree is its XML representation. So the following basically does that: -------------------------- import copy_reg import lxml.etree import lxml.objectify def treeFactory(state): """Un-Pickle factory.""" return lxml.objectify.fromstring(state) copy_reg.constructor(treeFactory) def reduceObjectifiedElement(object): """Reduce function for lxml.objectify trees. See http://docs.python.org/lib/pickle-protocol.html for details. """ return (treeFactory, (lxml.etree.tostring(object), )) copy_reg.pickle(lxml.objectify.ObjectifiedElement, reduceObjectifiedElement, treeFactory) ----------------------------------------- You might consider just registering the reduce function in lxml itself. Shouldn't hurt, should it. -- Christian Zagrodnick gocept gmbh & co. kg · forsterstrasse 29 · 06112 halle/saale www.gocept.com · fon. +49 345 12298894 · fax. +49 345 12298891

2 4

[lxml-dev] lxml namespaces
by Maxim Sloyko 20 Feb '08

20 Feb '08

Hi All! I have a little problem with XML namespaces. In my application I have two XML processors, that process the same document, one after the other. The first one looks for nodes in 'ns1' namespace, and substitutes them, according to some algorithm. After this processor is finished, it is guaranteed that there are no more 'ns1' nodes left in the tree. 'ns1' namespace dclaration is still there, in the root node (well, I put it there manually). Now, when this namespace is no longer needed, I want to get rid of it, because it confuses some other processors (namely, my browser) So, the question is, how do I do that? del tree.getroot().nsmap['ns1'] does not seem to do the trick :( Thanks in advance and Happy Holidays! -- Maxim Sloyko

3 5

[lxml-dev] Problem with lxml-1.1.2 and binary text nodes
by Narayan Desai 29 Mar '07

29 Mar '07

I seem to recall that Lxml used to raise an exception if binary data was put into a text node of an xml element. Was this change intentional? Is there any way to use lxml to check for document well-formedness before sending out xml? thanks... -nld

2 2

[lxml-dev] lxml 1.3beta released
by Stefan Behnel 02 Mar '07

02 Mar '07

Hi all, together with 1.2.1, I released a beta version of the upcoming 1.3 series. It contains a number of bigger changes and enhancements over the 1.2 series. The main difference is a rewrite of the internal namespace cleanup code that should reduce the problems related to duplicated namespace declarations and the like. There are also some new things at the API level, including a DTD class for validating against DTDs and two helper modules that were written by Fredrik Lundh for simpler XML/HTML generation. I'm not sure the two modules will stay in (and keep their current name), so don't bet your job on them for now. I personally like them a lot, though. Have fun, Stefan Changelog for 1.3beta (2007-02-27) Features added * DTD validator class (like RelaxNG and XMLSchema) * HTML generator helpers by Fredrik Lundh in lxml.htmlbuilder * ElementMaker XML generator by Fredrik Lundh in lxml.builder.E * Support for pickeling objectify.ObjectifiedElement objects to XML * update() method on Element.attrib * Optimised replacement for libxml2's _xmlReconsiliateNs(). This allows lxml a better handling of namespaces when moving elements between documents. Bugs fixed * Possible memory leaks in namespace handling when moving elements between documents Other changes * major restructuring in the documentation

5 9

[lxml-dev] lxml 1.2.1 released
by Stefan Behnel 27 Feb '07

27 Feb '07

Hi, I just released lxml 1.2.1 to cheeseshop. This is a bugfix only release for the 1.2 series. Changelog: Bugs fixed: * Build fixes for MS compiler * Item assignments to special names like element["text"] failed * Renamed ObjectifiedDataElement.__setText() to _setText() to make it easier to access * The pattern for attribute names in ObjectPath was too restrictive Have fun, Stefan

4 4

[lxml-dev] Building from lxml 1.2 tarball
by Sidnei da Silva 27 Feb '07

27 Feb '07

I'm getting an error when trying to build lxml from the 1.2 tarball. I suspect it has something to do with Pyrex? Here's the error: building 'lxml.objectify' extension c:\Arquivos de programas\Microsoft Visual Studio .NET 2003\Vc7\bin\cl.exe /c /no logo /Ox /MD /W3 /GX /DNDEBUG -IC:\src\lxml-build\\libxml2-2.6.26.win32\include -IC:\src\lxml-build\\libxslt-1.1.17.win32\include -IC:\src\lxml-build\\zlib-1.2. 3.win32\include -IC:\src\lxml-build\\iconv-1.9.2.win32\include -Ic:\Python24\inc lude -Ic:\Python24\PC /Tcsrc/lxml/objectify.c /Fobuild\temp.win32-2.4\Release\sr c/lxml/objectify.obj -w cl : Command line warning D4025 : overriding '/W3' with '/w' objectify.c c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(164) : error C2143: syntax error : m issing ';' before 'type' c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(164) : error C2143: syntax error : m issing ';' before 'const' c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(164) : error C2059: syntax error : ' )' c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(164) : error C2059: syntax error : ' =' c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(166) : error C2065: 'c_api_init' : u ndeclared identifier c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(166) : error C2223: left of '->ob_re fcnt' must point to struct/union c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(167) : error C2065: 'init' : undecla red identifier c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(173) : error C2063: 'init' : not a f unction c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(176) : error C2059: syntax error : ' return' c:\src\lxml-build\lxml-1.2\src\lxml\etree.h(177) : error C2059: syntax error : ' }' -- Sidnei da Silva Enfold Systems http://enfoldsystems.com Fax +1 832 201 8856 Office +1 713 942 2377 Ext 214

2 5

[lxml-dev] Link error on __ftol2
by Sidnei da Silva 27 Feb '07

27 Feb '07

While trying to build lxml for Python 2.3 I hit an error that seems to have an easy solution, described here: http://mail.gnome.org/archives/xml/2004-March/msg00182.html Now, the suggested fix is to add the said decl to some .cpp file. I am wondering where would be a place to put that in lxml. -- Sidnei da Silva Enfold Systems http://enfoldsystems.com Fax +1 832 201 8856 Office +1 713 942 2377 Ext 214

2 1

[lxml-dev] Objectify and a text-tag
by Christian Zagrodnick 27 Feb '07

27 Feb '07

Hi assuming i've got an XML like <foo><text>blabla</text></foo> How am I supposed to change the blabla text? foo.text does obviously not work since that is the text value of foo. foo['text'] would have been nice, but that's not working either. Any suggestions? -- Christian Zagrodnick gocept gmbh & co. kg · forsterstrasse 29 · 06112 halle/saale www.gocept.com · fon. +49 345 12298894 · fax. +49 345 12298891

3 5

[lxml-dev] Validating against an external DTD
by Michael Guntsche 26 Feb '07

26 Feb '07

Hello, I just noticed that lxml has DTD-validation against external DTDs now in trunk YAAAAAAAAAAYYY. Thank you, thank you, thank you. I played around a little bit with it and noticed that assertValid is not working correctly. Is support for this planned as well or should I stick to using DTD.validate()? I would prefer an exception though. Kind regards, Michael PS: THANK you once again for adding this. If everything works out, I will remove pyxml completely from my application in the near future.

2 2

[lxml-dev] needing a python 2.3 for windows version of the lxml lib
by Jean-Pierre Vitulli 26 Feb '07

26 Feb '07

hello, I read your mailing list archive and look also in cheeseshop.python.org I noticed that some people had problems to find a windows version of the lxml lib. Ashish Kulkarni did compile it for python 2.5 but after tried to install Silva and OAI packages for it under Zope, I had to return to version 2.3 of Python in order to make all things run correctly. So, does someone know where I could find a windows and Python 2.3 version of lxml ? Or could someone build one or help me to do it ? Thanks.

1 0