Mailman 3 December 2022 - lxml - The Python XML Toolkit

[lxml-dev] lxml has its page on launchpad
by Stefan Behnel 10 Apr '23

10 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 09 Apr '23

09 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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Canonicalization of PROV-XML Documents fails
by Steven 30 Jan '23

30 Jan '23

Hey everyone, i want to canonicalize Prov Documents, which are encoded according to the PROV-XML Scheme (https://www.w3.org/TR/prov-xml/). I used the etree.canonicalize method with the following XML document: https://openprovenance.org/store/documents/5763.xml . Unfortunately the order of elements remains unchanged. I tried to pass the XML via file and via string - but the cancolized document look unchanged. Does lxml cant deal with XML-Extensions?

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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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Question about inheritance in cssselect.py
by Dani Litovsky Alcala 23 Dec '22

23 Dec '22

lxml v.4.9 cssselect.py:CSSSelector.__init__ calls on `etree.XPath.__init__(self, path, namespaces=namespaces)` to initialize the parent class. Is there a reason why `super()` or even `super(CSSSelector, self)__init__...` is not used? I bring this up as if I attempt to monkey patch (private project) `etree.XPath.__init__` the current code causes an error ``` TypeError: super(type, obj): obj must be an instance or subtype of type ``` while replacing it with the suggested use of `super()` fixes my error.

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%s formatting in documentation (in stead of f-string)
by t.roes＠247interfaces.nl 20 Dec '22

20 Dec '22

Switching to lxml for xml parsing and generating, I was somewhat puzzeled by the usage line's like XHTML_NAMESPACE = "http://www.w3.org/1999/xhtml" XHTML = "{%s}" % XHTML_NAMESPACE With more modern f-string's this could also be written as XHTML = f"{{{XHTML_NAMESPACE}}}" This may be because I only started on Python on 3.7, and have never worked with any 2.x I quite understand there is no time to rework all the doc's in the low income on this project. Just two questions: - is there (another) good reason not to is f-string formatting? And if not - is there a way to assist on reworking the doc's Thomas Roes

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Re: zlib error
by Ajayi, Temitope 16 Dec '22

16 Dec '22

Thank you for your response I am using the pre-built binary wheels through pip install lxml When I looked through the files, I noticed in the path lxml/includes/extlibs that the zlib.h file in that folder says version 1.2.11 for the latest version of lxml which is 4.9.2. Am I doing something wrong?

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Re: zlib error
by Ajayi, Temitope 15 Dec '22

15 Dec '22

Thank you for your response I am using the pre-built binary wheels through pip install lxml When I looked through the files, I noticed in the path lxml/includes/extlibs that the zlib.h file in that folder says version 1.2.11 for the latest version of lxml which is 4.9.2. Am I doing something wrong?

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zlib error
by Ajayi, Temitope 15 Dec '22

15 Dec '22

Hi It seems the version of zlib used in lxml is outdated. It currently shows up as zlib 1.2.11 instead of zlib 1.2.13 on scan reports and therefore vulnerable to CVE-2018-25032 and CVE-2022-37434. Can I get some help on if this is correct or I am doing something wrong? Thank you

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