Mailman 3 November 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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No Python 3.11 wheels built for/on PyPi ?
by Athanasius 19 Nov '22

19 Nov '22

I've just gotten around to looking at migrating a project to Python 3.11 and upon `pip install -r requirements-dev.txt` I'm seeing there are no lxml Python 3.11 wheels on PyPi, which leads to `pip` trying to compile it locally, and I of course don't have the requirements installed. Whilst I could address the latter for my local environment that won't help with building on GitHub for releases (we use `lxml` specifically to build a WiX configuration file for the building an installer). Any timeline on making Python 3.11 wheels available ?

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Simpler wheel distribution for Windows
by null 18 Nov '22

18 Nov '22

Hi. This is my first time using an email mailing list so please inform me if this is not the proper channel. I'm packaging a python application which depends on LXML. As you're all aware, installing this library on Windows is not the most straightforward thing due to its laughable lack of pre-installed build tools. This can be circumvented in several ways which are well documented by LXML, however, as noted in the website, asking end users to install these tools to build it from source is usually not feasible. While researching this issue I learned the [UCI website](https://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml) maintains Windows specific wheels which allow automating the process of installing them through PIP. Having these wheel files is great because it completely lifts the burden of fetching and building the dependencies from the user, they can be integrated with the default pyproject.toml format and are installed automatically as any other dependency. However, due to PyPI's stupid requirement of not allowing direct links as stated dependencies, I cannot publish my package there using this method, as the UCI website is not a trusted a source. I was wondering if there was some way you could publish these Windows specific wheels on PyPI so it's easier for other PyPI projects which depend on this library to package for Windows. This also seems beneficial from a security perspective, since many people end up relying on an external source for precompiled binaries which are not necessarily trustworthy. I can't speculate, but there are several StackOverflow answers with hundreds of thousands of views which point to that website as the most reliable way of installing LXML on Windows, and should anyone upload malicious code there, it could be a problem. Thanks, Gwyn

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10 Nov '22

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