lxml - The Python XML Toolkit October 2013

lxml@python.org

9 participants
13 discussions

[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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Installing lxml under MacOS 10.8
by John W. Shipman 24 Oct '13

24 Oct '13

I need some help installing lxml under MacOS 10.8 with Python 2.7.2. I have this version in a directory: lxml-lxml-70a122c I'm using the instructions here: http://lxml.de/build.html#building-lxml-on-macos-x Here's what I typed: sudo python setup.py build --static-deps --without-cython It grinds for a while and fails with this message: clang: error: no such file or directory: 'src/lxml/lxml.etree.c' I've tried a number of other approaches and gotten nowhere. Using macports, it wants to replace my Python 2.7.2 with something like 2.7.5_1, and if I do, I can't even start Python. Can anyone recommend how to proceed at this point? Best regards, John Shipman, Web Developer, National Radio Astronomy Observatories; john(a)nmt.edu, http://www.nmt.edu/~shipman/

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MacOS 10.8 install: success!
by John W. Shipman 23 Oct '13

23 Oct '13

Please disregard the previous message. I have lxml now! The approaches with macports, homebrew, and pip all failed. This worked, and quickly: sudo easy_install lxml Best regards, John Shipman, Web Developer, National Radio Astronomy Observatories; john(a)nmt.edu, http://www.nmt.edu/~shipman/

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Fwd: Re: lxml:objectify: data type of attribute
by jholg＠gmx.de 23 Oct '13

23 Oct '13

cc-ing the list ---------- Forwarded Message ---------- Subject: Re: [lxml] lxml:objectify: data type of attribute Date: Wednesday, October 23, 2013, 14:46:36 From: Sebastian Fey, ambiHome GmbH <fey(a)ambihome.de> To: jholg(a)gmx.de >you may be able to hook custom element classes into lxml that provide you with a similar >type lookup scheme for the elem.get()/set()/attrib() stuff, if you don't care about>elem.set('attr_a', '5') being returned as elem.get('attr_a') -> 5 [int] or the like. this would be fine. I'll have a look when I've got some time left and post a possible solution to the list till then my code will be a.get("attr") = str(int(b.get("value") + int(c.get("value"))) :) thank you -----------------------------------------

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lxml:objectify: data type of attribute
by Sebastian Fey, ambiHome GmbH 22 Oct '13

22 Oct '13

is there any way to specify the data type of an attribute? Seems like its always string. -- ambiHome GmbH Theaterstr. 19 52062 Aachen Tel +49-241-5380948-3 Fax +49-241-5380948-9 info(a)ambiHome.de Gesellschaft mit beschränkter Haftung Amtsgericht Aachen, HRB 15813 USt-IdNr. DE268539526 Geschäftsführung: Dipl.-Ing. Roman Wienert

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cssselect: Dropping Python 2.4 and 3.1 support
by Simon Sapin 15 Oct '13

15 Oct '13

Hi, I’d like to officially drop support for Python 2.4 and 3.1 in cssselect. * Neither Travis CI or Tox support these versions anymore, * Recent versions of pip and virtualenv do not support 2.4, * 3.1 does not even build anymore on my system. This makes testing on these versions quite difficult. Nothing will break overnight, but future cssselect releases may break support without me noticing. Older releases will remain available on PyPI. As lxml "Python 2.4 or later" and has an optional dependency on cssselect for lxml.cssselect, is there an objection to this plan? -- Simon Sapin

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Attribute access inconsistency when using namespace
by Wichert Akkerman 14 Oct '13

14 Oct '13

I am receiving XML document using namespace, but I’m having problems trying to access attributes. All our input matches an XSD, but not everyone uses namespace the same way in documents delivered to us: some documents use a default namespace, which results in the attribute being present in the attrib dictionary without any namespace declarations. Other documents use explicit namespace everywhere, which results in attributes always using the namespace in the attrib dictionary, even if the namespace is the exact same as the namespace of the element itself. Here is a small test case demonstrating the problem: from lxml import etree NS = 'http://www.example.com/ns1' def find_id(root): elem = root.find('{%s}elem' % NS) import pdb ; pdb.set_trace() return elem.attrib.get('id') input1 = '''<root xmlns="http://www.example.com/ns1"> <elem id="1"/> </root>''' print 'Result with default namespace: %s' % find_id(etree.fromstring(input1)) input2 = '''<e:root xmlns:e="http://www.example.com/ns1"> <e:elem e:id="1"/> </e:root>''' print 'Result with explicit namespace: %s' % find_id(etree.fromstring(input2)) Which results in this output: Result with default namespace: 1 Result with explicit namespace: None While I would like to have “1” as result for both inputs. Is there a simple/official way to get the right attribute? The only option I can see is to always look at the element’s nsmap to find possible matches: def get_attribute(elem, namespace, attr): for (prefix, ns) in elem.nsmap.items(): if ns == namespace: key = '%s%s' % ('' if prefix is None else '{%s}' % ns, attr) value = elem.attrib.get(key) if value is not None: return value return None This works, but is not very efficient or pretty. Wichert.

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lxml - The Python XML Toolkit October 2013