lxml - The Python XML Toolkit September 2014

lxml@python.org

10 participants
16 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 20 Sep '22

20 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 30 Aug '22

30 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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missing void elements
by Burak Arslan 03 Oct '14

03 Oct '14

Hello, Where's the lxml issue tracker? I couldn't find it? Void elements are html tags that don't need a closing tag. is a well known example: >>> from lxml.builder import E >>> html.tostring(E.br()) ' ' >>> etree.tostring(E.br()) ' ' >>> is not a void element, so: >>> html.tostring(E.p()) '' >>> etree.tostring(E.p()) '' see the full list: http://www.w3.org/TR/html5/syntax.html#elements-0 While working on etree.htmlfile, I noticed that the following tags are not treated as void: embed, keygen, source, track, wbr see: https://github.com/lxml/lxml/pull/142#issuecomment-55588559 because of this, lxml can produce invalid html. once this issue is resolved, the tuple at: https://github.com/lxml/lxml/commit/c039e03798d84ac3f897354f0780f15346da136… needs to be updated. best, burak

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How to use result of nsmap in xpath
by Kun JIN 30 Sep '14

30 Sep '14

hello, "nsmap" is an lxml.element function to get namespaces of the element, usually, a None type will be returned, like: {'olac': 'http://www.language-archives.org/OLAC/1.1/', None: 'http://www.imsglobal.org/xsd/imscp_v1p1'} i want use this namespaces in XPath, but i got an error: TypeError: empty namespace prefix is not supported in XPath so, i must delete this NoneType by creating a new dictionay in Python: dic_ns = {} for element in root.nsmap: if element is None: continue dic_ns[element] = root.nsmap[element] QUESTION: is there some other methods to do this? Thank you in advance, Bests, Kun

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generating html with incremental writer
by Burak Arslan 25 Sep '14

25 Sep '14

Hi, Is there a way to pass method='html' to etree.xmlfile()? Or any other way to serialize incrementally to html? Best, Burak

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Best way of dealing with empty attributes
by Charlie Clark 24 Sep '14

24 Sep '14

Hi, we often have the case where element attributes may turn out to be None. This leads to an error in lxml when creating an Element, or serialising it in ElementTree. Is it possible to configure the behaviour is such situations? Either to ignore the attribute or just create it with no value? Charlie -- Charlie Clark Managing Director Clark Consulting & Research German Office Kronenstr. 27a Düsseldorf D- 40217 Tel: +49-211-600-3657 Mobile: +49-178-782-6226

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possible bug: parse() and fromstring() have different results
by tcqwerty＠emhsoft.com 23 Sep '14

23 Sep '14

Basically, I would expect ET.parse(StringIO(test_string)) and ET.fromstring(test_string) to return the same data. Instead, parse() returns an ElementTree, and fromstring() returns an Element. ---- from StringIO import StringIO from lxml import etree as ET test_string = """<root>data</root>""" tree1 = ET.parse(StringIO(test_string)) tree2 = ET.fromstring(test_string) print ET.tostring(tree1), type(tree1) print ET.tostring(tree2), type(tree2) ---- Output: <root>data</root> <type 'lxml.etree._ElementTree'> <root>data</root> <type 'lxml.etree._Element'>

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lxml - The Python XML Toolkit September 2014