[Generateds-discuss] How to create/ generate new xml from generated API

[Dewitte, D. W (US) <dan...@ba...>]

Hi Dave,

This is one of the better tools that I have found and I think the only one that can work the way I need it too, I just need some help with getting to the finish line.

My goal is generate a new .xml using a known schema .xsd with Python as the base language (required).  I have 13 different reports that all have a different format that are generated on a constant basis that I need to import into a known .xsd format for upload to a database.

I believe I either want to use the build methods, or the "one-per" options, but I can't get either of them to work.  I asked about the build method problem on stackover flow here:  Stackoverflow - Creating a new XML from an XSD using GenerateDS and Python<https://stackoverflow.com/questions/72397436/creating-a-new-xml-from-an-xsd-using-generateds-and-python>

But I am not sure that the build method is what I want to use.

When I try the "one-per" I get the following errors:
Command line method, I believe this error is due to that the .xsd is in a UTF-8 encoding.  How do I get this to work with UTF-8 encoding?
>(base) H:\Python Training\GenerateDS_Docs>python generateds.py --one-file-per-xsd --output-directory="OnePer" --module-suffix="One" TestResults.xsd
>Traceback (most recent call last):
> File "H:\Python Training\GenerateDS_Docs\generateds.py", line 9906, in <module>
    main()
> File "H:\Python Training\GenerateDS_Docs\generateds.py", line 9872, in main
    parseAndGenerate(
> File "H:\Python Training\GenerateDS_Docs\generateds.py", line 9318, in parseAndGenerate
    parser.parse(rootFile)
> File "C:\EngTools\Anaconda3\lib\xml\sax\expatreader.py", line 111, in parse
    xmlreader.IncrementalParser.parse(self, source)
> File "C:\EngTools\Anaconda3\lib\xml\sax\xmlreader.py", line 123, in parse
    buffer = file.read(self._bufsize)
> File "C:\EngTools\Anaconda3\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
> UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 4013: character maps to <undefined>

Approach 2 - Extraction and Generation Utilities:
> (base) h:\Python Training\GenerateDS_Docs\utils>python collect_schema_locations.py --force --verbose TestResults.xsd testJson.txt
> Traceback (most recent call last):
> File "h:\Python Training\GenerateDS_Docs\utils\collect_schema_locations.py", line 157, in <module>
    main()
> File "h:\Python Training\GenerateDS_Docs\utils\collect_schema_locations.py", line 148, in main
    extract_and_generate(infile, outfile, extract_locations_fn, options)
> File "h:\Python Training\GenerateDS_Docs\utils\collect_schema_locations.py", line 86, in extract_and_generate
    locations = extract_locations(infile, options)
> File "h:\Python Training\GenerateDS_Docs\utils\collect_schema_locations.py", line 50, in extract_locations
    elements = root.xpath('xs:import', namespaces=root.nsmap)
> File "src/lxml/etree.pyx", line 1579, in lxml.etree._Element.xpath
> File "src/lxml/xpath.pxi", line 259, in lxml.etree.XPathElementEvaluator.__init__
> File "src/lxml/xpath.pxi", line 131, in lxml.etree._XPathEvaluatorBase.__init__
> File "src/lxml/xpath.pxi", line 55, in lxml.etree._XPathContext.__init__
> File "src/lxml/extensions.pxi", line 81, in lxml.etree._BaseContext.__init__
> TypeError: empty namespace prefix is not supported in XPath

Attached are the .xsd that I am using.  TestResults.xsd references Common.xsd.

Any help on getting started with my overall goal will be much appreciated.  I am looking to create a new XML from a known .xsd and add in the elements and child elements and attributes as needed.

Thank you for the help,
Daniel DeWitte