Mailman 3 September 2018 - 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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lxml query with xmlns?
by Peng Yu 26 Sep '18

26 Sep '18

Hi, I am trying to parse the following xml file with xmlns. But I got the following error. Could anybody show me what is the correct way to call xpath()? ==> main.py <== #!/usr/bin/env python # vim: set noexpandtab tabstop=2 shiftwidth=2 softtabstop=-1 fileencoding=utf-8: from lxml import etree import sys tree = etree.parse(sys.stdin) print tree.xpath('tr', namespaces={None: "http://www.w3.org/TR/html4/"}) ==> main.xml <== <table xmlns="http://www.w3.org/TR/html4/"> <tr> <td>Apples</td> <td>Bananas</td> </tr> </table> $ ./main.py < main.xml Traceback (most recent call last): File "./main.py", line 7, in <module> print tree.xpath('tr', namespaces={None: "http://www.w3.org/TR/html4/"}) File "src/lxml/lxml.etree.pyx", line 2269, in lxml.etree._ElementTree.xpath (src/lxml/lxml.etree.c:66309) File "src/lxml/xpath.pxi", line 327, in lxml.etree.XPathDocumentEvaluator.__init__ (src/lxml/lxml.etree.c:167199) File "src/lxml/xpath.pxi", line 261, in lxml.etree.XPathElementEvaluator.__init__ (src/lxml/lxml.etree.c:166233) File "src/lxml/xpath.pxi", line 133, in lxml.etree._XPathEvaluatorBase.__init__ (src/lxml/lxml.etree.c:164467) File "src/lxml/xpath.pxi", line 57, in lxml.etree._XPathContext.__init__ (src/lxml/lxml.etree.c:163400) File "src/lxml/extensions.pxi", line 84, in lxml.etree._BaseContext.__init__ (src/lxml/lxml.etree.c:152398) TypeError: empty namespace prefix is not supported in XPath -- Regards, Peng

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lxml 4.2.5 released – security fix for HTML cleaner
by Stefan Behnel 15 Sep '18

15 Sep '18

Hi all, I released lxml 4.2.5 with an important bug fix for the HTML cleaner tool. It failed to remove JavaScript in encoded URLs. The documentation is here: https://lxml.de/ Download: https://pypi.python.org/pypi/lxml/4.2.5 Changelog: https://lxml.de/4.2/changes-4.2.5.html Github: https://github.com/lxml/lxml/releases/tag/lxml-4.2.5 This release was built using Cython 0.28.5. If you are interested in commercial support or customisations for the lxml package, please contact me directly. Have fun, Stefan 4.2.5 (2018-09-09) ================== Bugs fixed ---------- * Javascript URLs that used URL escaping were not removed by the HTML cleaner. Security problem found by Omar Eissa of Deloitte.

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lxml and memory consumption
by Wietse Jacobs 12 Sep '18

12 Sep '18

Hello, We are writing an ETL tool and we use lxml to parse a lot of XML files. The problem we are having is that lxml uses a considerable amount of memory which it doesn't release. I've already disabled caching of 'ID's. I've read in the archives of this list that lxml also caches a lot of other strings. By itself this isn't a problem, but the fact that this cache isn't cleared when lxml is "done" is a problem. Once the XML files have been imported the other stages in the ETL pipeline also need memory. Is there a way to clear this cache from client code? TIA, Wietse

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