Mailman 3 March 2023 - 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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Re: When is a number not a number
by Holger.Joukl＠LBBW.de 03 Mar '23

03 Mar '23

> Hi, > Does anyone think this needs to be posted to the bug tracker? > > lxml seems to identify superscripts as an integer but then throws an exception. > > Thanks > > Alex > > > from lxml import objectify > xml = """ > <types> > <mysuperscript>²²²²²²²²²²</mysuperscript> > </types> > """ > doc = objectify.fromstring(xml) > print(objectify.dump(doc)) > > > Traceback (most recent call last): > File “**********.py", line 11, in <module> > print(objectify.dump(doc)) > ^^^^^^^^^^^^^^^^^^^ > File "src/lxml/objectify.pyx", line 1521, in lxml.objectify.dump > File "src/lxml/objectify.pyx", line 1549, in lxml.objectify._dump > File "src/lxml/objectify.pyx", line 1526, in lxml.objectify._dump > File "src/lxml/objectify.pyx", line 646, in lxml.objectify.NumberElement.__repr__ > File "src/lxml/objectify.pyx", line 946, in lxml.objectify._parseNumber > ValueError: invalid literal for int() with base 10: '²²²²²²²²²²' Looks like a bug to me. For reasons I don't yet understand, the int type check in objectify's type guesser (see https://lxml.de/objectify.html#how-data-types-are-matched) does not fail for this input: >>> objectify.getRegisteredTypes() [PyType(int, IntElement), PyType(float, FloatElement), PyType(bool, BoolElement), PyType(long, IntElement), PyType(str, StringElement), PyType(NoneType, NoneElement), PyType(none, NoneElement)] >>> objectify.getRegisteredTypes()[0] PyType(int, IntElement) >>> print(objectify.getRegisteredTypes()[0].type_check("222")) None >>> print(objectify.getRegisteredTypes()[0].type_check("²²²²²²²²²²")) # Should raise! None >>> print(objectify.getRegisteredTypes()[0].type_check("abcd")) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "stringsource", line 67, in cfunc.to_py.__Pyx_CFunc_object____object___to_py.wrap File "src/lxml/objectify.pyx", line 1054, in lxml.objectify._checkInt File "src/lxml/objectify.pyx", line 1047, in lxml.objectify._checkNumber ValueError >>> However: >>> int("²²²²²²²²²²") Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: invalid literal for int() with base 10: '²²²²²²²²²²' Probably a bug in _checkNumber(): https://github.com/lxml/lxml/blob/d01872ccdf7e1e5e825b6c6292b43e7d27ae5fc4/… Best regards, Holger Landesbank Baden-Wuerttemberg Anstalt des oeffentlichen Rechts Hauptsitze: Stuttgart, Karlsruhe, Mannheim, Mainz HRA 12704 Amtsgericht Stuttgart HRA 4356, HRA 104 440 Amtsgericht Mannheim HRA 40687 Amtsgericht Mainz Die LBBW verarbeitet gemaess Erfordernissen der DSGVO Ihre personenbezogenen Daten. Informationen finden Sie unter https://www.lbbw.de/datenschutz.

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Re: When is a number not a number
by Holger.Joukl＠LBBW.de 02 Mar '23

02 Mar '23

> > ValueError: invalid literal for int() with base 10: '²²²²²²²²²²' > > > > Probably a bug in _checkNumber(): > > https://github.com/lxml/lxml/blob/d01872ccdf7e1e5e825b6c6292b43e7d27ae > > 5fc4/src/lxml/objectify.pyx#L974 > > str.isdigit() accepts many Unicode characters classified as digits that int() rejects. > > Marius Gedminas So maybe isdecimal() would be more appropriate in _checkNumber()? >>> "22222".isdecimal() True >>> "²²²²²".isdecimal() False >>> Holger Landesbank Baden-Wuerttemberg Anstalt des oeffentlichen Rechts Hauptsitze: Stuttgart, Karlsruhe, Mannheim, Mainz HRA 12704 Amtsgericht Stuttgart HRA 4356, HRA 104 440 Amtsgericht Mannheim HRA 40687 Amtsgericht Mainz Die LBBW verarbeitet gemaess Erfordernissen der DSGVO Ihre personenbezogenen Daten. Informationen finden Sie unter https://www.lbbw.de/datenschutz.

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Re: When is a number not a number
by Alex Hippel 01 Mar '23

01 Mar '23

Sorry, I forgot to include the version numbers: Python : sys.version_info(major=3, minor=11, micro=1, releaselevel='final', serial=0) lxml.etree : (4, 9, 2, 0) libxml used : (2, 9, 14) libxml compiled : (2, 9, 14) libxslt used : (1, 1, 35) libxslt compiled : (1, 1, 35)

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lxml - The Python XML Toolkit March 2023