Mailman 3 August 2014 - lxml - The Python XML Toolkit

[lxml-dev] lxml has its page on launchpad
by Stefan Behnel April 11, 2023

April 11, 2023

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 April 10, 2023

April 10, 2023

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 Jan. 30, 2023

Jan. 30, 2023

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 Jan. 11, 2023

Jan. 11, 2023

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 Aug. 31, 2022

Aug. 31, 2022

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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generating html with incremental writer
by Burak Arslan Sept. 25, 2014

Sept. 25, 2014

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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Unexpected output when using xpath() twice
by Alan Evangelista Aug. 29, 2014

Aug. 29, 2014

When I try to use xpath() method twice, I get unexpected outputs. >>> from lxml import etree >>> xml_systems = etree.fromstring("<systems><system name='gekko1'/><system name='gekko2'/></systems>") # get all nodes with name 'system' which are children of root node 'systems' >>> xml_system_list = xml_systems.xpath("/systems/system") >>> etree.tostring(xml_system_list[0]) '<system name="gekko1"/>' >>> etree.tostring(xml_system_list[1]) '<system name="gekko2"/>' # get 'name' attribute of all 'system's nodes in the hierarchy >>> xml_system_list[0].xpath("//system/@name") ['gekko1', 'gekko2'] # get 'name' attribute of root node 'system' >>> xml_system_list[0].xpath("/system/@name") [] I expected 'gekko1' string as output in two last commands. Maybe I have not understood the API correctly? What should I do to get the behavior I expect? FYI if I convert xml_system_list[0] to string and convert it back to XML using tostring() and fromstring(), I get the expected output. Regards, Alan Evangelista

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lxml 3.3.6 released
by Stefan Behnel Aug. 28, 2014

Aug. 28, 2014

Hi all, I just released lxml 3.3.6. This is a bug-fix-only release for the stable lxml 3.3 series that fixes a couple of crashes. The documentation is here: http://lxml.de/ Download: http://lxml.de/files/lxml-3.3.6.tgz Signature: http://lxml.de/files/lxml-3.3.6.tgz.asc Changelog: http://lxml.de/3.3/changes-3.3.6.html Github: https://github.com/lxml/lxml/commit/4c8e222b6704b78381bdcaa5f6d3abf1d041d0b4 This release was built using Cython 0.20.1. If you are interested in commercial support or customisations for the lxml package, please contact me directly. Have fun, Stefan 3.3.6 (2014-08-28) ================== Bugs fixed ---------- * Prevent tree cycle creation when adding Elements as siblings. * LP#1361948: crash when deallocating Element siblings without parent. * LP#1354652: crash when traversing internally loaded documents in XSLT extension functions.

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position attribute of XMLSyntaxError seems wrong
by Will McGugan Aug. 26, 2014

Aug. 26, 2014

Hi, I'm catching XMLSyntaxError's in my app and displaying information regarding the error. In particular, the line and column of the error form the 'position' attribute of the exception. The line is fine, but the column doesn't seem to correspond to the point where I would consider the error to have occurred. Here's a small Python 2 that shows the problem: xml = b"""<test> <tag foo="some text" namespace:attr="value" /> </test> """ from lxml import etree import io lines = xml.splitlines() try: root = etree.parse(io.BytesIO(xml)).getroot() except Exception as e: line, col = e.position print lines[line - 1] print " " * (col - 1) + '^' I get the following output from that: <tag foo="some text" namespace:attr="value" /> ^ Any help would be appreciated... Will McGugan -- Will McGugan http://www.willmcgugan.com

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a question about a loop within a loop
by Martin Mueller Aug. 22, 2014

Aug. 22, 2014

I would be greateful for advice on the following: I iterate over a sequence of sibling elements with the typical code for element in tree.iter(tei +'w', tei +'c'): do this or that Within that sequence there are shorter sequences (between two or seven elements) that begin with an element <w part="I"/> and end with an element <w part="F"/>. There may or may not be one or more elements of the type <w part="M"/>. Since most of the cases involve sequences of two or three elements, I've dealt with code like "if the next-but-one" element has a part='F' attribute." That works for the simple cases, but it would be much better if I could break out of the current iteration, isolate the sequence that goes from <w part="I"/> to <w part="F"/>, iterate over it, and integrate the result ( a single <w> element) back into the tree. But I don't know how to write code that would 1.start at a known point and make that the point of departure for a sequence that can be iterated over 2. gather the elements that follow it until I come to the unknown future point that is defined by part="F" And I don't know whether that would be an lxml or a more general Python procedure. Martin Mueller Professor emeritus of English and Classics Northwestern University

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