Mailman 3 July 2025 - lxml - The Python XML Toolkit

A possible problem with processing of XSLT
by Schimon Jehudah Sept. 10, 2025

Sept. 10, 2025

Good evening. I am manipulating XSLT files with LXML. Much of it works well. Yet, it appears, that there is an issue with LXML, or libxml2, or libxslt upon rare circumstances which I am not sure that I am eloquent enough to explain. I would appreciate help in analyzing this possible issue, if this is indeed a genuine issue. I have detailed and linked to the relevant code. https://git.xmpp-it.net/sch/Rivista/issues/6 Please advise. P.S. I will be available during Saturday or Sunday evening. Kind regards, Schimon

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Published an article about lxml error debugging - available on Medium
by Abraham Polk July 14, 2025

July 14, 2025

Hi all, I published an article on lxml and libxml2, and I thought people on this mailing list might be interested. Specifically, it's about using libxml2's native debugging functions to get more information on lxml errors. I wrote it to help lxml users do web scraping more effectively, as well as to help anyone contributing to the codebase debug it. I hope others find this useful, and feedback is welcome! https://medium.com/@abepolk/getting-more-information-on-lxml-errors-via-lib… Best, Abe

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lxml 6.0.0: XMLSchemaParseError: Invalid argument
by Austin Matherne July 6, 2025

July 6, 2025

Hi, I’m upgrading a project from lxml 5.4.0 to the newly released lxml 6.0.0 and encountering an unexpected XMLSchemaParseError. I’ve distilled the problem into a minimal, self-contained example and uploaded it as a GitHub gist: https://gist.github.com/AustinMatherne/533a4b6a31a63e11bfd8c09c03c05183 * The same XML and XSD files parse and schema validate cleanly with lxml 5.4.0. * With lxml 6.0.0, calling XMLSchema() raises an XMLSchemaParseError with no obvious culprit. Is this a bug in libxml, lxml, or am I doing something unsupported with the API? Thank you for your time and help, Austin

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