lxml - The Python XML Toolkit December 2021

lxml@python.org

9 participants
13 discussions

[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] Checking whether a node is a comment/element
by Geoffrey Sneddon 11 Jan '23

11 Jan '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] 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] lxml has its page on launchpad
by Stefan Behnel 21 Sep '22

21 Sep '22

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] 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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Tested value modified in validation error message
by Bob Kline 15 Jul '22

15 Jul '22

Before I file a ticket, I wanted to check here to find out if this is a known problem (I searched the bug tracker, but didn't see any matches). Our customer is using a commercial XML editor and the editor's implementation of the DOM API sometimes garbles whitespace inside text nodes when serializing XML documents for the document's xml property. This causes schema validation errors when we send that serialization off to be validated against the document type's schema using lxml. The problem we have run into with lxml is that the message property of the error object which comes back in the schema object's error_log has altered the value being validated. So, for example, if the text content of an element in the serialized DOM is "Processing\ncomplete" and the value it was supposed to match in the enumerated valid values is "Processing complete" then the message attribute for the corresponding object in the error_log has Element 'ProcessingStatusValue': [facet 'enumeration'] The value 'Processing complete' is not an element of the set {'Ready for English peer review', 'Ready for English scientific review', 'Ready for English OCCM review', 'Ready for Spanish peer review', 'Ready for Spanish OCCM review', 'Ready for publishing', 'Ready for translation', 'Processing complete'}. In effect saying "the value 'Processing complete' does not match the value 'Processing complete'." Took a very long time for us to figure out that the error message was wrong, and that it should have said ... The value 'Processing\ncomplete' is not an element of the set .... -- Bob Kline https://www.rksystems.com mailto:bkline@rksystems.com

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Support for XSL/T 2.0
by Bob Kline 17 Feb '22

17 Feb '22

Will lxml ever support XSL/T 2.0 (which achieved recommendation status 15 years ago)? Thanks. -- Bob Kline https://www.rksystems.com mailto:bkline@rksystems.com

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question about a bug when lxml runs in a conda environment
by Martin Mueller 06 Jan '22

06 Jan '22

I have used lxml extensively in a Pycharm environment that calls on a conda environment. Lately I encountered an odd error. The correct output of a marylamb.py script goes like this: <l xmlns="http://www.tei-c.org/ns/1.0"> Mary had a little lamb,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Its fleece was white as snow, yeah.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Everywhere the child went,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> The little lamb was sure to go, yeah.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> He followed her to school one day,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> And broke the teacher's rule.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> What a time did they have,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> That day at school.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Tisket, tasket,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> A green and yellow basket.</l> <l xmlns="http://www.tei-c.org/ns/1.0"> Sent a letter to my baby,</l> <l xmlns="http://www.tei-c.org/ns/1.0"> On my way I passed it.</l> In the buggy output the script runs amok and prints the current line plus the rest of the text. I print it out at the end of this memo. The Pycharms folks were able to identify the conda environment as the likely culprit. If I run the script outside it doeesn’t happen. The problem seems to be limited to lxml running in a conda environment, because scripts that don’t use lxml are not plague by that bug. Has anybody encountered a similar problem or has a suggestion how to fix it. I guess not using conda is an option, but it’s convenient in many other ways. Here is the buggy output, with an empty line added after each line to make it a little more readable <l xmlns="http://www.tei-c.org/ns/1.0"> Mary had a little lamb,</l><l> Its fleece was white as snow, yeah.</l><l> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Its fleece was white as snow, yeah.</l><l> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Everywhere the child went,</l><l> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> The little lamb was sure to go, yeah.</l></lg><lg><l> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> He followed her to school one day,</l><l> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> And broke the teacher's rule.</l><l> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> What a time did they have,</l><l> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> That day at school.</l></lg><lg><l> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Tisket, tasket,</l><l> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> A green and yellow basket.</l><l> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> Sent a letter to my baby,</l><l> On my way I passed it.</l></lg></div></body></text></TEI> <l xmlns="http://www.tei-c.org/ns/1.0"> On my way I passed it.</l></lg></div></body></text></TEI>

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ISO-20022 validation not possible with new xsd schema
by Jean de Bosset 16 Dec '21

16 Dec '21

The payment schema for ISO-20022 lxml.etree.XMLSchemaParseError: Element '{http://www.w3.org/2001/XMLSchema}pattern': The value '[\p{IsBasicLatin}\p{IsLatin-1Supplement}\p{IsLatinExtended-A}€ȘșȚț-[\p{C}]]+' of the facet 'pattern' is not a valid regular expression., line 1434 Here is the XSD part <xs:simpleType name="SPSText"> <xs:restriction base="xs:string"> <xs:pattern value="[\p{IsBasicLatin}\p{IsLatin-1Supplement}\p{IsLatinExtended-A}€ȘșȚț-[\p{C}]]+"/> </xs:restriction> </xs:simpleType>

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Support for XSL/T 2.0
by Bob Kline 15 Dec '21

15 Dec '21

Will lxml ever support XSL/T 2.0 (which achieved recommendation status 15 years ago)? Thanks. -- Bob Kline https://www.rksystems.com mailto:bkline@rksystems.com

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lxml - The Python XML Toolkit December 2021