Mailman 3 February 2006 - lxml - The Python XML Toolkit

[lxml-dev] OT - Schema conversion
by Werner F. Bruhin 07 Feb '06

07 Feb '06

I am trying to convert XSD schema to Relax NG to get the best of both worlds - maybe. Looked at Trang but it does not convert from XSD to Relax, just the other way round but I found the Sun Relax NG converter which should be able to do it. But I can't get it to work and my Java knowledge is probably less then none. Has anyone used this conversion tool successfully? I am getting the following exception: Sun Relax NG Converter version 20030225 C:\Dev\TheWineCellarBook\xml\sunconverter>java -jar rngconv.jar wineXML.xsd > wineXML.rng Exception in thread "main" java.lang.ClassCastException at com.sun.msv.datatype.xsd.TypeIncubator.derive(TypeIncubator.java:216) at com.sun.msv.reader.datatype.xsd.XSDatatypeExp$1.derive(XSDatatypeExp.java:92) at com.sun.msv.reader.datatype.xsd.RestrictionState.annealType(RestrictionState.java:41) at com.sun.msv.reader.datatype.xsd.TypeWithOneChildState.makeType(TypeWithOneChildState.java :42) at com.sun.msv.reader.datatype.xsd.TypeState._makeType(TypeState.java:76) at com.sun.msv.reader.datatype.xsd.TypeState.endSelf(TypeState.java:52) at com.sun.msv.reader.SimpleState.endElement(SimpleState.java:100) at org.xml.sax.helpers.XMLFilterImpl.endElement(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch( Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.msv.reader.util.GrammarLoader._loadSchema(GrammarLoader.java:511) at com.sun.msv.reader.util.GrammarLoader.parse(GrammarLoader.java:331) at com.sun.msv.reader.util.GrammarLoader.loadSchema(GrammarLoader.java:178) at com.sun.msv.writer.relaxng.Driver.main(Unknown Source) I am on Windows XP Pro and I am not familar with Java (version installed is j2re1.4.2_01) Tried to find info on the Sun site and posted on their list but no answer till now. Maybe someone can point me in the right direction to get this working. See you Werner

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[lxml-dev] memory leak in el.get() ?
by Scott Haeger 05 Feb '06

05 Feb '06

I am getting a memory leak using the get attribute method. The following will illustrate the problem: el = etree.Element("element") el.set('a', 'first') while True: x = el.get('a') Memory usage as displayed in top continues will continue to grow. I am using the following: lxml 0.8 libxml2 2.6.23 Fedora Core 3 Scott

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[lxml-dev] XMLParser + XMLFormatter ?
by Stefan Behnel 02 Feb '06

02 Feb '06

Hi, Andreas requested a new feature that mainly relates to output formatting. The obvious API for it might be a new keyword argument. However, since we seem to be getting more and more keyword arguments in the I/O functions, maybe we should rethink the way we set options on output methods. Fredrik mentioned the possibility to have an XMLParser that only wrapps options like this: class XMLParser: def __init__(self, **options): self.options = options doc = ET.parse(source, parser=XMLParser(configuration)) What about doing the same with output options? Imagine this: class XMLFormatter: def __init__(self, xhtml=False, pretty_print=False, indent=4, ...): self.options = {} ... xml_text = ET.write_str(XMLFormatter(pretty_print=True)) That would give us a nice, symmetric API for input and output options. If you prefer, you could easily use sublasses to provide different default arguments: class XMLPrettyPrinter(XMLFormatter): def __init__(..., pretty_print=True, ...): Comments? Stefan

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[lxml-dev] install problem on Windows XP
by Werner F. Bruhin 02 Feb '06

02 Feb '06

I am running into problems trying to: \python24\python setup.py install I changed the following in setup.py: #include_dirs = guess_dirs('--cflags', '-I') #library_dirs = guess_dirs('--libs', '-L') # if you want to configure include and library dir manually, you can do # so here, for instance: include_dirs = [r'C:\Python24\Lib\site-packages\libxslt-1.1.14.win32\include',] # '/home/faassen/tmp/local_new/include'] library_dirs = [r'C:\Python24\Lib\site-packages\libxml2-2.6.20.win32\lib'] But I am getting an error that I need .net SDK (error: The .NET Framework SDK needs to be installed before building extensions f or Python.). Did I not change the setup.py correctly or do I really need the .net SDK. Any chance that there is a binary build for Windows XP is available? See you Werner

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