Mailman 3 November 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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lmxl incremental XML serialisation repeats namespaces
by Jan-Christoph Klie 08 Nov '18

08 Nov '18

Hello, I am currently serializing some largish XML files in Python with lxml. I want to use the incremental writer for that. My XML format heavily relies on namespaces and attributes. When I run the following code from io import BytesIO from lxml import etree sink = BytesIO() nsmap = { 'test': 'http://test.org', 'foo': 'http://foo.org', 'bar': 'http://bar.org', } with etree.xmlfile(sink) as xf: with xf.element("test:testElement", nsmap=nsmap): name = etree.QName(nsmap["foo"], "fooElement") elem = etree.Element(name) xf.write(elem) print(sink.getvalue().decode('utf-8')) then I get the following output: <test:testElement xmlns:bar="http://bar.org" xmlns:foo="http://foo.org" xmlns:test="http://test.org"> <ns0:fooElement xmlns:ns0="http://foo.org"/> </test:testElement> As you can see, the namespace for `foo` is repeated and not my prefix: <ns0:fooElement xmlns:ns0="http://foo.org"/> How do I make it so lxml only adds the namespace in the root and children use the correct prefix from there? I think I need to use `etree.Element`, as I need to add some attributes to the node. What did not work: 1) Using `register_namespace` for prefix, uri in nsmap.items(): etree.register_namespace(prefix, uri) That still repeats, but makes the prefix correct. I do not like it too much, as it changes stuff globally. 2) Specifying the `nsmap` in the element: elem = etree.Element(name, nsmap=nsmap) yields <foo:fooElement xmlns:bar="http://bar.org" xmlns:foo="http://foo.org" xmlns:test="http://test.org"/> for the `fooElement`. I also looked in the documentation and source code of lxml, but it is Cython so really hard to read and search. The context manager of `xf.element` does not return the element. e.g. with xf.element('foo:fooElement') as e: print(e) prints `None`. I already asked on stackoverflow (https://stackoverflow.com/questions/53083828/lmxl-incremental-xml-serialisa…), but did not receive a suitable answer. Regards, Jan

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lxml - The Python XML Toolkit November 2018