Mailman 3 January 2014 - lxml - The Python XML Toolkit

[lxml-dev] lxml has its page on launchpad
by Stefan Behnel 11 Apr '23

11 Apr '23

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 10 Apr '23

10 Apr '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] 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 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] 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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generating html with incremental writer
by Burak Arslan 25 Sep '14

25 Sep '14

Hi, Is there a way to pass method='html' to etree.xmlfile()? Or any other way to serialize incrementally to html? Best, Burak

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SyntaxError when parsing UTF8-BOM encoded XML file
by Stefano Fontana 30 Jan '14

30 Jan '14

Hello, I run into some issues when trying to parse a UTF8-BOM file (Python 2.7). It was working fine until version 3.2.5 but it is not starting from version 3.3.0-beta1. This is the error I've been getting when trying to do etree.iterparse(path, tag='item'): File "iterparse.pxi", line 166, in lxml.etree.iterparse.__next__ (src/lxml/lxml.etree.c:116372) XMLSyntaxError: Document is empty, line 1, column 1 I had a look at tests/test_elementtree.py and saw that it's different from what it used to be years ago: def test_encoding_utf8_bom(self): utext = _str('Søk på nettet') uxml = (_str('<?xml version="1.0" encoding="UTF-8"?>') + _str('<p>%s</p>') % utext) bom = _bytes('\\xEF\\xBB\\xBF').decode("unicode_escape").encode("latin1") xml = bom + uxml.encode("utf-8") tree = etree.XML(xml) self.assertEqual(utext, tree.text) In the mailing list I only managed to find this thread: http://article.gmane.org/gmane.comp.python.lxml.devel/2967/match=bom but it's not relevant because it's from 2007. That said, lxml is amazing :) Thank you, Stefano-

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lxml 3.3.0 released
by Stefan Behnel 26 Jan '14

26 Jan '14

Hi all, I'm happy to announce the final release of lxml 3.3.0. It adds several major features compared to the 3.2 release series. This includes improved API support for incremental parsing in asynchronous environments, more efficient Unicode parsing in Python 3.3, support for the upcoming CPython 3.4, and recovery from parser errors in iterparse(). It also features safety fixes in numerous areas. I appended the full change log for your convenience. The documentation is here: http://lxml.de/ Download: http://lxml.de/files/lxml-3.3.0.tgz Signature: http://lxml.de/files/lxml-3.3.0.tgz.asc Changelog: http://lxml.de/3.3/changes-3.3.0.html Github: https://github.com/lxml/lxml/commit/dcfaf4311fdab59706dc7084c47af44c40cbb4bd This release was built using Cython 0.20. If you are interested in commercial support or customisations for the lxml package, please contact me directly. Have fun, Stefan 3.3.0 (2014-01-26) ================== Features added -------------- Bugs fixed ---------- * The heuristic that distinguishes file paths from URLs was tightened to produce less false negatives. Other changes ------------- 3.3.0beta5 (2014-01-18) ======================= Features added -------------- * The PEP 393 unicode parsing support gained a fallback for wchar strings which might still be somewhat common on Windows systems. Bugs fixed ---------- * Several error handling problems were fixed throughout the code base that could previously lead to exceptions being silently swallowed or not properly reported. * The C-API function ``appendChild()`` is now deprecated as it does not propagate exceptions (its return type is ``void``). The new function ``appendChildToElement()`` was added as a safe replacement. * Passing a string into ``fromstringlist()`` raises an exception instead of parsing the string character by character. Other changes ------------- * Document cleanup code was simplified using the new GC features in Cython 0.20. 3.3.0beta4 (2014-01-12) ======================= Features added -------------- Bugs fixed ---------- * The (empty) value returned by the ``attrib`` property of Entity and Comment objects was mutable. * Element class lookup wasn't available for the new pull parsers or when using a custom parser target. * Setting Element attributes on instantiation with both the ``attrib`` argument and keyword arguments could modify the mapping passed as ``attrib``. * LP#1266171: DTDs instantiated from internal/external subsets (i.e. through the docinfo property) lost their attribute declarations. Other changes ------------- * Built with Cython 0.20pre (gitrev 012ae82eb) to prepare support for Python 3.4. 3.3.0beta3 (2014-01-02) ======================= Features added -------------- * Unicode string parsing was optimised for Python 3.3 (PEP 393). Bugs fixed ---------- * HTML parsing of Unicode strings could misdecode the input on some platforms. * Crash in xmlfile() when closing open elements out of order in an error case. Other changes ------------- 3.3.0beta2 (2013-12-20) ======================= Features added -------------- * ``iterparse()`` supports the ``recover`` option. Bugs fixed ---------- * Crash in ``iterparse()`` for HTML parsing. * Crash in target parsing with attributes. Other changes ------------- * The safety check in the read-only tree implementation (e.g. used by ``PythonElementClassLookup``) raises a more appropriate ``ReferenceError`` for illegal access after tree disposal instead of an ``AssertionError``. This should only impact test code that specifically checks the original behaviour. 3.3.0beta1 (2013-12-12) ======================= Features added -------------- * New option ``handle_failures`` in ``make_links_absolute()`` and ``resolve_base_href()`` (lxml.html) that enables ignoring or discarding links that fail to parse as URLs. * New parser classes ``XMLPullParser`` and ``HTMLPullParser`` for incremental parsing, as implemented for ElementTree in Python 3.4. * ``iterparse()`` enables recovery mode by default for HTML parsing (``html=True``). Bugs fixed ---------- * LP#1255132: crash when trying to run validation over non-Element (e.g. comment or PI). * Error messages in the log and in exception messages that originated from libxml2 could accidentally be picked up from preceding warnings instead of the actual error. * The ``ElementMaker`` in lxml.objectify did not accept a dict as argument for adding attributes to the element it's building. This works as in lxml.builder now. * LP#1228881: ``repr(XSLTAccessControl)`` failed in Python 3. * Raise ``ValueError`` when trying to append an Element to itself or to one of its own descendants, instead of running into an infinite loop. * LP#1206077: htmldiff discarded whitespace from the output. * Compressed plain-text serialisation to file-like objects was broken. * lxml.html.formfill: Fix textarea form filling. The textarea used to be cleared before the new content was set, which removed the name attribute. Other changes ------------- * Some basic API classes use freelists internally for faster instantiation. This can speed up some ``iterparse()`` scenarios, for example. * ``iterparse()`` was rewritten to use the new ``*PullParser`` classes internally instead of being a parser itself.

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[PATCH] autodetect top dir in downloaded libs
by vano＠mail.mipt.ru 23 Jan '14

23 Jan '14

As of now, `setup.py --static --static-deps' fails with: <...> Retrieving "ftp://ftp.zlatkovic.com/pub/libxml/zlib-1.2.5.win32.zip" to "libs\zlib-1.2.5.win32.zip" Unpacking zlib-1.2.5.win32.zip into libs Traceback (most recent call last): <...> File "C:\Users\native_api\Documents\lxml\buildlibxml.py", line 47, in download_and_extract_zlatkovic_binaries d = unpack_zipfile(destfile, destdir) File "C:\Users\native_api\Documents\lxml\buildlibxml.py", line 62, in unpack_zipfile assert os.path.exists(edir), 'missing: %s' % edir AssertionError: missing: libs\zlib-1.2.5.win32 The reason is that the top level dir in ftp://ftp.zlatkovic.com/pub/libxml/zlib-1.2.5.win32.zip is `zlib-1.2.5', not `zlib-1.2.5.win32' as unpack_zipfile() expects. The patch provided autodetectes the top dir name in downloaded files which fixes the issue. Though the site's maintainer probably needs to fix the root cause too.

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lxml 3.3.0 beta 5 released as release candidate
by Stefan Behnel 18 Jan '14

18 Jan '14

Hi all, I just released the fifth beta of lxml 3.3.0 as a final release candidate. It contains some major bug fixes again, but also a critical change under the hood that became possible with Cython 0.20. The final release is expected as soon as Cython 0.20 is released (so there will be a rebuild, but otherwise no further changes). Please give it all the testing you can afford, especially on MS-Windows, for which I added a bit of code for some Unicode parsing corner cases in CPython 3.3. The documentation is here: http://lxml.de/ Download: http://lxml.de/files/lxml-3.3.0beta5.tgz Signature: http://lxml.de/files/lxml-3.3.0beta5.tgz.asc Changelog: http://lxml.de/3.3/changes-3.3.0beta5.html Github: https://github.com/lxml/lxml/commit/9a8ccef6860ba2c80392d4e2ebdf14c487913ef4 This release was built using Cython 0.20rc1, gitrev 11081196b. If you are interested in commercial support or customisations for the lxml package, please contact me directly. Have fun, Stefan 3.3.0beta5 (2014-01-18) ======================= Features added -------------- * The PEP 393 unicode parsing support gained a fallback for wchar strings which might still be somewhat common on Windows systems. Bugs fixed ---------- * Several error handling problems were fixed throughout the code base that could previously lead to exceptions being silently swallowed or not properly reported. * The C-API function ``appendChild()`` is now deprecated as it does not propagate exceptions (its return type is ``void``). The new function ``appendChildToElement()`` was added as a safe replacement. * Passing a string into ``fromstringlist()`` raises an exception instead of parsing the string character by character. Other changes ------------- * Document cleanup code was simplified using the new GC features in Cython 0.20.

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