lxml - The Python XML Toolkit January 2008

lxml@python.org

22 participants
32 discussions

[lxml-dev] Reparenting a node
by Lawrence Oluyede 30 Jan '23

30 Jan '23

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 has its page on launchpad
by Stefan Behnel 20 Sep '22

20 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 30 Aug '22

30 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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[lxml-dev] lxml 2.0 beta1 released
by Stefan Behnel 22 Dec '08

22 Dec '08

Hi all, I finally managed to push lxml 2.0beta1 over to PyPI. This release marks the end of the four month alpha cycle of lxml 2.0. The last stable release series, lxml 1.3, saw the light of day more than six months ago. http://codespeak.net/lxml/dev/ http://pypi.python.org/pypi/lxml/2.0beta1 The complete changelog for beta1 and the 2.0 alpha series follows below. Apart from a number of important fixes and enhancements, this beta release also finalises the major API changes that make the difference between 1.x and 2.x. Incompatible changes after this release will require a very good motivation. As usual, compatible enhancements will always be embraced - as will be updates, clarifications and fixes for the documentation! Asking back helps. I expect beta1 to also be the last beta release before lxml 2.0 final (hopefully not in the sense that alpha4/5/6 were), so please test as much as you can to spot any remaining bugs and problems. Note that this release depends on a bug fix in Cython that will hopefully be released as Cython 0.9.6.11 in a couple of days. I attached the necessary patch for those who want work on the sources. Another thing: there was a security advisory on the libxml2 mailing list. To prevent DoS attacks, systems that parse XML from untrusted sources should be updated to libxml2 2.6.31 (or should apply the patch that is referenced in Daniel's post below). http://mail.gnome.org/archives/xml/2008-January/msg00036.html Sidnei, when you build the Windows binaries, could you please wait for libxml2 2.6.31 to become available as binaries as well? Hopefully, that won't take too long... Have fun, Stefan 2.0beta1 (2008-01-11) ===================== Features added -------------- * Parse-time XML schema validation (``schema`` parser keyword). * XPath string results of the ``text()`` function and attribute selection make their Element container accessible through a ``getparent()`` method. As a side-effect, they are now always unicode objects (even ASCII strings). * ``XSLT`` objects are usable in any thread - at the cost of a deep copy if they were not created in that thread. * Invalid entity names and character references will be rejected by the ``Entity()`` factory. * ``entity.text`` returns the textual representation of the entity, e.g. ``&``. Bugs fixed ---------- * XPath on ElementTrees could crash when selecting the virtual root node of the ElementTree. * Compilation ``--without-threading`` was buggy in alpha5/6. Other changes ------------- * Minor performance tweaks for Element instantiation and subelement creation 2.0alpha6 (2007-12-19) ====================== Features added -------------- * New properties ``position`` and ``code`` on ParseError exception (as in ET 1.3) Bugs fixed ---------- * Memory leak in the ``parse()`` function. * Minor bugs in XSLT error message formatting. * Result document memory leak in target parser. Other changes ------------- * Various places in the XPath, XSLT and iteration APIs now require keyword-only arguments. * The argument order in ``element.itersiblings()`` was changed to match the order used in all other iteration methods. The second argument ('preceding') is now a keyword-only argument. * The ``getiterator()`` method on Elements and ElementTrees was reverted to return an iterator as it did in lxml 1.x. The ET API specification allows it to return either a sequence or an iterator, and it traditionally returned a sequence in ET and an iterator in lxml. However, it is now deprecated in favour of the ``iter()`` method, which should be used in new code wherever possible. * The 'pretty printed' serialisation of ElementTree objects now inserts newlines at the root level between processing instructions, comments and the root tag. * A 'pretty printed' serialisation is now terminated with a newline. * Second argument to ``lxml.etree.Extension()`` helper is no longer required, third argument is now a keyword-only argument ``ns``. * ``lxml.html.tostring`` takes an ``encoding`` argument. 2.0alpha5 (2007-11-24) ====================== Features added -------------- * Rich comparison of ``element.attrib`` proxies. * ElementTree compatible TreeBuilder class. * Use default prefixes for some common XML namespaces. * ``lxml.html.clean.Cleaner`` now allows for a ``host_whitelist``, and two overridable methods: ``allow_embedded_url(el, url)`` and the more general ``allow_element(el)``. * Extended slicing of Elements as in ``element[1:-1:2]``, both in etree and in objectify * Resolvers can now provide a ``base_url`` keyword argument when resolving a document as string data. * When using ``lxml.doctestcompare`` you can give the doctest option ``NOPARSE_MARKUP`` (like ``# doctest: +NOPARSE_MARKUP``) to suppress the special checking for one test. Bugs fixed ---------- * Target parser failed to report comments. * In the ``lxml.html`` ``iter_links`` method, links in ``<object>`` tags weren't recognized. (Note: plugin-specific link parameters still aren't recognized.) Also, the ``<embed>`` tag, though not standard, is now included in ``lxml.html.defs.special_inline_tags``. * Using custom resolvers on XSLT stylesheets parsed from a string could request ill-formed URLs. * With ``lxml.doctestcompare`` if you do ``<tag xmlns="...">`` in your output, it will then be namespace-neutral (before the ellipsis was treated as a real namespace). Other changes ------------- * The module source files were renamed to "lxml.*.pyx", such as "lxml.etree.pyx". This was changed for consistency with the way Pyrex commonly handles package imports. The main effect is that classes now know about their fully qualified class name, including the package name of their module. * Keyword-only arguments in some API functions, especially in the parsers and serialisers. 2.0alpha4 (2007-10-07) ====================== Features added -------------- Bugs fixed ---------- * AttributeError in feed parser on parse errors Other changes ------------- * Tag name validation in lxml.etree (and lxml.html) now distinguishes between HTML tags and XML tags based on the parser that was used to parse or create them. HTML tags no longer reject any non-ASCII characters in tag names but only spaces and the special characters ``<>&/"'``. 2.0alpha3 (2007-09-26) ====================== Features added -------------- * Separate ``feed_error_log`` property for the feed parser interface. The normal parser interface and ``iterparse`` continue to use ``error_log``. * The normal parsers and the feed parser interface are now separated and can be used concurrently on the same parser instance. * ``fromstringlist()`` and ``tostringlist()`` functions as in ElementTree 1.3 * ``iterparse()`` accepts an ``html`` boolean keyword argument for parsing with the HTML parser (note that this interface may be subject to change) * Parsers accept an ``encoding`` keyword argument that overrides the encoding of the parsed documents. * New C-API function ``hasChild()`` to test for children * ``annotate()`` function in objectify can annotate with Python types and XSI types in one step. Accompanied by ``xsiannotate()`` and ``pyannotate()``. Bugs fixed ---------- * XML feed parser setup problem * Type annotation for unicode strings in ``DataElement()`` Other changes ------------- * lxml.etree now emits a warning if you use XPath with libxml2 2.6.27 (which can crash on certain XPath errors) * Type annotation in objectify now preserves the already annotated type by default to prevent loosing type information that is already there. 2.0alpha2 (2007-09-15) ====================== Features added -------------- * ``ET.write()``, ``tostring()`` and ``tounicode()`` now accept a keyword argument ``method`` that can be one of 'xml' (or None), 'html' or 'text' to serialise as XML, HTML or plain text content. * ``iterfind()`` method on Elements returns an iterator equivalent to ``findall()`` * ``itertext()`` method on Elements * Setting a QName object as value of the .text property or as an attribute will resolve its prefix in the respective context * ElementTree-like parser target interface as described in http://effbot.org/elementtree/elementtree-xmlparser.htm * ElementTree-like feed parser interface on XMLParser and HTMLParser (``feed()`` and ``close()`` methods) Bugs fixed ---------- * lxml failed to serialise namespace declarations of elements other than the root node of a tree * Race condition in XSLT where the resolver context leaked between concurrent XSLT calls Other changes ------------- * ``element.getiterator()`` returns a list, use ``element.iter()`` to retrieve an iterator (ElementTree 1.3 compatible behaviour) 2.0alpha1 (2007-09-02) ====================== Features added -------------- * Reimplemented ``objectify.E`` for better performance and improved integration with objectify. Provides extended type support based on registered PyTypes. * XSLT objects now support deep copying * New ``makeSubElement()`` C-API function that allows creating a new subelement straight with text, tail and attributes. * XPath extension functions can now access the current context node (``context.context_node``) and use a context dictionary (``context.eval_context``) from the context provided in their first parameter * HTML tag soup parser based on BeautifulSoup in ``lxml.html.ElementSoup`` * New module ``lxml.doctestcompare`` by Ian Bicking for writing simplified doctests based on XML/HTML output. Use by importing ``lxml.usedoctest`` or ``lxml.html.usedoctest`` from within a doctest. * New module ``lxml.cssselect`` by Ian Bicking for selecting Elements with CSS selectors. * New package ``lxml.html`` written by Ian Bicking for advanced HTML treatment. * Namespace class setup is now local to the ``ElementNamespaceClassLookup`` instance and no longer global. * Schematron validation (incomplete in libxml2) * Additional ``stringify`` argument to ``objectify.PyType()`` takes a conversion function to strings to support setting text values from arbitrary types. * Entity support through an ``Entity`` factory and element classes. XML parsers now have a ``resolve_entities`` keyword argument that can be set to False to keep entities in the document. * ``column`` field on error log entries to accompany the ``line`` field * Error specific messages in XPath parsing and evaluation NOTE: for evaluation errors, you will now get an XPathEvalError instead of an XPathSyntaxError. To catch both, you can except on ``XPathError`` * The regular expression functions in XPath now support passing a node-set instead of a string * Extended type annotation in objectify: new ``xsiannotate()`` function * EXSLT RegExp support in standard XPath (not only XSLT) Bugs fixed ---------- * lxml.etree did not check tag/attribute names * The XML parser did not report undefined entities as error * The text in exceptions raised by XML parsers, validators and XPath evaluators now reports the first error that occurred instead of the last * Passing '' as XPath namespace prefix did not raise an error * Thread safety in XPath evaluators Other changes ------------- * objectify.PyType for None is now called "NoneType" * ``el.getiterator()`` renamed to ``el.iter()``, following ElementTree 1.3 - original name is still available as alias * In the public C-API, ``findOrBuildNodeNs()`` was replaced by the more generic ``findOrBuildNodeNsPrefix`` * Major refactoring in XPath/XSLT extension function code * Network access in parsers disabled by default

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[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

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[lxml-dev] Help with an error message
by Konstantin Ryabitsev 14 May '08

14 May '08

Hi, everyone: I'm having trouble with the following case. One of my automatic import scripts takes data from one source and submits it to another as an XML feed. Recently, it started failing because one of the entries contains a null. The testcase is such: from lxml.etree import Element sourcestr = 'Contains a null: \x00' unistr = unicode(sourcestr, 'utf-8') elt = Element('foo').text = unistr Running it will cause the following error: Traceback (most recent call last): File "foo.py", line 6, in <module> elt = Element('foo').text = unistr File "etree.pyx", line 741, in etree._Element.text.__set__ File "apihelpers.pxi", line 344, in etree._setNodeText File "apihelpers.pxi", line 648, in etree._utf8 AssertionError: All strings must be XML compatible, either Unicode or ASCII Can someone suggest the best way to deal with this? Kind regards, -- Konstantin Ryabitsev Montréal, Québec

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[lxml-dev] lxml namespaces
by Maxim Sloyko 19 Feb '08

19 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

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[lxml-dev] requesting lxml testimonials?
by Martijn Faassen 05 Feb '08

05 Feb '08

Hi there, With Stefan, I really like reading lxml testimonials. Though lxml is now in many ways far more his than mine, it's still also my baby and I'm a happy user and quite proud. My testimonial won't count for much though. :) It looked like Stefan was interested in collecting testimonials to link to from the lxml pages. Perhaps we can expand this and get some quotes to put on the website. I think that would be a good idea - lxml should be considered by anyone who needs a good XML library with Python, and a few happy quotes by users might make them feel more confident about it. What do you think about making this a little project, Stefan? Anyone else wants to give a testimonial, together with permission for its use? Regards, Martijn

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[lxml-dev] build & performance issues with 2.0beta2
by jholg＠gmx.de 04 Feb '08

04 Feb '08

Hi there, sorry to interrupt the testimonial celebrations ;-) but I'm having some problems with 2.0beta2: First of all, it does not build any more using gcc 2.95.2, yes I know, might old compiler...then again, Cython produces C code, not funky C++ stuff (2.0alpha-r47832 still built without problems). This is the error I get: $ /apps/pydev/hjoukl/bin/python2.4 setup.py build Building with Cython 0.9.6.11b. Building lxml version 2.0.beta2-51091. running build [...] cythoning src/lxml/lxml.etree.pyx to src/lxml/lxml.etree.c building 'lxml.etree' extension creating build/temp.solaris-2.8-sun4u-2.4 creating build/temp.solaris-2.8-sun4u-2.4/src creating build/temp.solaris-2.8-sun4u-2.4/src/lxml gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -I/apps/prod//include -I/apps/prod//include/libxml2 -I/apps/prod/include/libxml2 -I/apps/prod/include -I/apps/pydev/hjoukl/include/python2.4 -c src/lxml/lxml.etree.c -o build/temp.solaris-2.8-sun4u-2.4/src/lxml/lxml.etree.o -w src/lxml/lxml.etree.c: In function `__pyx_PyInt_AsLongLong': src/lxml/lxml.etree.c:110165: parse error before `long' src/lxml/lxml.etree.c:110167: `val' undeclared (first use in this function) src/lxml/lxml.etree.c:110167: (Each undeclared identifier is reported only once src/lxml/lxml.etree.c:110167: for each function it appears in.) src/lxml/lxml.etree.c: In function `__pyx_PyInt_AsUnsignedLongLong': src/lxml/lxml.etree.c:110185: parse error before `long' src/lxml/lxml.etree.c:110187: `val' undeclared (first use in this function) error: command 'gcc' failed with exit status 1 1 pytaf@adevp02 .../lxml-2.0beta2 $ Now, when I switch to use gcc 3.4.4 I can build successfully, but: 0 lb54320@adevp02 .../lxml-2.0beta2 $ LD_LIBRARY_PATH=/apps/prod/gcc/3.4.4/lib python2.4 test.py -p -v '' '!test_schematron_invalid*' /data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/html/__init__.py:22: UserWarning: This version of libxml2 has a known XPath bug. Use it at your own risk. _rel_links_xpath = etree.XPath("descendant-or-self::a[@rel]") TESTED VERSION: 2.0.beta2-51091 Python: (2, 4, 4, 'final', 0) lxml.etree: (2, 0, -98, 51091) libxml used: (2, 6, 27) libxml compiled: (2, 6, 27) libxslt used: (1, 1, 20) libxslt compiled: (1, 1, 20) 855/855 (100.0%): Doctest: xpathxslt.txt ====================================================================== FAIL: Doctest: validation.txt ---------------------------------------------------------------------- Traceback (most recent call last): File "/apps/prod//lib/python2.4/unittest.py", line 260, in run testMethod() File "/apps/prod//lib/python2.4/doctest.py", line 2157, in runTest raise self.failureException(self.format_failure(new.getvalue())) AssertionError: Failed doctest test for validation.txt File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 0 ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 113, in validation.txt Failed example: dtd = etree.DTD(external_id = docbook) # requires catalog support Exception raised: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[16]>", line 1, in ? dtd = etree.DTD(external_id = docbook) # requires catalog support File "dtd.pxi", line 50, in lxml.etree.DTD.__init__ DTDParseError: failed to load external entity "-//OASIS//DTD DocBook XML V4.2//EN" ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 116, in validation.txt Failed example: dtd.assertValid(root) # doctest: +ELLIPSIS Expected: Traceback (most recent call last): DocumentInvalid: Element article content does not follow the DTD, ... Got: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[18]>", line 1, in ? dtd.assertValid(root) # doctest: +ELLIPSIS File "lxml.etree.pyx", line 2375, in lxml.etree._Validator.assertValid DocumentInvalid: No declaration for element article, line 1 ====================================================================== FAIL: Doctest: validation.txt ---------------------------------------------------------------------- Traceback (most recent call last): File "/apps/prod//lib/python2.4/unittest.py", line 260, in run testMethod() File "/apps/prod//lib/python2.4/doctest.py", line 2157, in runTest raise self.failureException(self.format_failure(new.getvalue())) AssertionError: Failed doctest test for validation.txt File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 0 ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 113, in validation.txt Failed example: dtd = etree.DTD(external_id = docbook) # requires catalog support Exception raised: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[16]>", line 1, in ? dtd = etree.DTD(external_id = docbook) # requires catalog support File "dtd.pxi", line 50, in lxml.etree.DTD.__init__ DTDParseError: failed to load external entity "-//OASIS//DTD DocBook XML V4.2//EN" ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 116, in validation.txt Failed example: dtd.assertValid(root) # doctest: +ELLIPSIS Expected: Traceback (most recent call last): DocumentInvalid: Element article content does not follow the DTD, ... Got: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[18]>", line 1, in ? dtd.assertValid(root) # doctest: +ELLIPSIS File "lxml.etree.pyx", line 2375, in lxml.etree._Validator.assertValid DocumentInvalid: No declaration for element article, line 1 ====================================================================== FAIL: Doctest: validation.txt ---------------------------------------------------------------------- Traceback (most recent call last): File "/apps/prod//lib/python2.4/unittest.py", line 260, in run testMethod() File "/apps/prod//lib/python2.4/doctest.py", line 2157, in runTest raise self.failureException(self.format_failure(new.getvalue())) AssertionError: Failed doctest test for validation.txt File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 0 ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 113, in validation.txt Failed example: dtd = etree.DTD(external_id = docbook) # requires catalog support Exception raised: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[16]>", line 1, in ? dtd = etree.DTD(external_id = docbook) # requires catalog support File "dtd.pxi", line 50, in lxml.etree.DTD.__init__ DTDParseError: failed to load external entity "-//OASIS//DTD DocBook XML V4.2//EN" ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 116, in validation.txt Failed example: dtd.assertValid(root) # doctest: +ELLIPSIS Expected: Traceback (most recent call last): DocumentInvalid: Element article content does not follow the DTD, ... Got: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[18]>", line 1, in ? dtd.assertValid(root) # doctest: +ELLIPSIS File "lxml.etree.pyx", line 2375, in lxml.etree._Validator.assertValid DocumentInvalid: No declaration for element article, line 1 ====================================================================== FAIL: Doctest: validation.txt ---------------------------------------------------------------------- Traceback (most recent call last): File "/apps/prod//lib/python2.4/unittest.py", line 260, in run testMethod() File "/apps/prod//lib/python2.4/doctest.py", line 2157, in runTest raise self.failureException(self.format_failure(new.getvalue())) AssertionError: Failed doctest test for validation.txt File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 0 ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 113, in validation.txt Failed example: dtd = etree.DTD(external_id = docbook) # requires catalog support Exception raised: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[16]>", line 1, in ? dtd = etree.DTD(external_id = docbook) # requires catalog support File "dtd.pxi", line 50, in lxml.etree.DTD.__init__ DTDParseError: failed to load external entity "-//OASIS//DTD DocBook XML V4.2//EN" ---------------------------------------------------------------------- File "/data/pydev/DOWNLOADS/LXML/lxml/versions/SVN_CHECKOUTS/TAGS/lxml-2.0beta2/src/lxml/tests/../../../doc/validation.txt", line 116, in validation.txt Failed example: dtd.assertValid(root) # doctest: +ELLIPSIS Expected: Traceback (most recent call last): DocumentInvalid: Element article content does not follow the DTD, ... Got: Traceback (most recent call last): File "/apps/prod//lib/python2.4/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest validation.txt[18]>", line 1, in ? dtd.assertValid(root) # doctest: +ELLIPSIS File "lxml.etree.pyx", line 2375, in lxml.etree._Validator.assertValid DocumentInvalid: No declaration for element article, line 1 ---------------------------------------------------------------------- Ran 855 tests in 37.860s FAILED (failures=4) 1 lb54320@adevp02 .../lxml-2.0beta2 $ Compared to 2.0alpha (I rebuilt that also with gcc 3.4.4): 2 pytaf@adevp02 .../current $ LD_LIBRARY_PATH=/apps/prod/gcc/3.4.4/lib python2.4 test.py -p -v '' '!test_schematron_invalid*' /data/pydev/DOWNLOADS/LXML/lxml/versions/lxml-2.0alpha-r47832/src/lxml/html/__init__.py:22: UserWarning: This version of libxml2 has a known XPath bug. Use it at your own risk. _rel_links_xpath = etree.XPath("descendant-or-self::a[@rel]") TESTED VERSION: 2.0.alpha4 Python: (2, 4, 4, 'final', 0) lxml.etree: (2, 0, -196, 0) libxml used: (2, 6, 27) libxml compiled: (2, 6, 27) libxslt used: (1, 1, 20) libxslt compiled: (1, 1, 20) 824/824 (100.0%): Doctest: xpathxslt.txt ---------------------------------------------------------------------- Ran 824 tests in 2.698s OK So basically performance drops by factor >10 for me, on a Sparc Solaris 8 box, python2.4, gcc 3.4.4. I haven't yet looked into the failing tests. Remarks: I currently disable the schematron tests because some of them dump core with my setup. Holger -- GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail

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[lxml-dev] etree.XSLT gets stuck
by Dmitri Fedoruk 31 Jan '08

31 Jan '08

Hello everybody, I'm a very happy lxml user, just in case :) But as my project is not public yet, I'd better not give the address yet. Anyway, we're close to the release. When it's ready, I promise to give my testimonials too, maybe along with the usage statistics and performance overview. > this has been a suspiciously calm week on the list Well, I wanted to write this later, but as I see this line... Yes, there is a problem I encounter. I'm using lxml-2.0beta1 at the moment. Did not upgrade to beta2 as I've waited for the release. As I have mentioned before, I use xslt for html generation out of xml. I have a bunch of templates and several machines with one and the same configuration. libxml2-2.6.30, libxslt-1.1.22, python 2.5.1, apache 2.2/mod_python 3.3.1, amd64, FreeBSD 6.2 . Every machine runs the same routine when my process is initialised - read a template, compile it & store it in the dictionary. The same code, the same data. It looks like this: xslt_parser = etree.XMLParser(no_network = False, resolve_entities = True, load_dtd = True) xslt_doc = etree.parse( urllib2.urlopen( xslt_path , xslt_parser ) transformations[ xslt_path ] = etree.XSLT(xslt_doc) Normally etree.XSLT runs in ~0.05 secons. Nevertheless, on one machine sometimes it gets stuck for 3-5 seconds. I'm sure it's not because of the urlopen, as I've measured the compilation time itself. Could there be any visible reasons for this? Cheers, Dmitri

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lxml - The Python XML Toolkit January 2008