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<p class="MsoNormal">Thanks for reports and correct diagnosis. I did take out the three “object” inheritances earlier today, pylint says it is no longer required in Python 3, no ill effects noted.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried to follow X3D4 Architecture exactly, and am keen to avoid overwriting! Hopefully tonight’s build looks a bit better.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The specification does not show X3DField inheriting from anything.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">X3D4 Architecture, 5.2.3 X3DField<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/fieldTypes.html#X3DField<o:p></o:p></li></ul>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">X3D4 Architecture, 54.4.2.3 Interface hierarchy
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">(looks like first line of Figure 4.2 needs more whitespace)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/concepts.html#InterfaceHierarchy<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sure enough, searching for “class _ X3DField” in x3d.py reveals two abstract class definitions, ouch! That’s more like multiple personalities that multiple inheritance…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Will work on fixing the autogeneration of offending version.<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">all the best, Don<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">--
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">Don Brutzman Naval Postgraduate School, Code USW/Br brutzman@nps.edu<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New",serif">X3D graphics, virtual worlds, navy robotics https://</span>
<span style="font-size:10.0pt;font-family:"Courier New",serif">faculty.nps.edu/brutzman<o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> vmarchetti@kshell.com <vmarchetti@kshell.com> <br>
<b>Sent:</b> Sunday, December 5, 2021 3:59 AM<br>
<b>To:</b> John Carlson <yottzumm@gmail.com><br>
<b>Cc:</b> Brutzman, Donald (Don) (CIV) <brutzman@nps.edu>; X3D-Public <x3d-public@web3d.org><br>
<b>Subject:</b> Re: [x3d-public] Results for today with x3d.py, _X3DField<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Python does support multiple inheritance, but these fragments are not an example of a multiple-inheritance situation -- rather, the later class definition -- where _X3DField is a subclass of _X3DNode, overwrites the earlier class definition.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In the x3d.py file, only three classes are defined as direct subclasses of object:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">class _X3DField<o:p></o:p></p>
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<p class="MsoNormal">class _X3DNode<o:p></o:p></p>
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<p class="MsoNormal">class _X3DStatement<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So I think the operative question is whether it is a design intent that _X3DField also should be a subclass of _X3DNode. I judge the answer is no, since that would include support for DEF, USE, and metadata. In that light, the second class
defintion for _X3DField would be regarded as a bug, to be corrected by modifying the X3duomToX3dPythonPackage.xslt stylesheet.<o:p></o:p></p>
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<p class="MsoNormal">On Dec 4, 2021, at 11:40 PM, John Carlson <<a href="mailto:yottzumm@gmail.com">yottzumm@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">Two declarations of _X3DField?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">$ grep "class _X3DField" x3d.py </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-family:"Courier New",serif;color:#FF5454;background:white">class _X3DField</span></b><span style="font-family:"Courier New",serif;color:black;background:white">(object):
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Courier New",serif;color:#FF5454;background:white">class _X3DField</span></b><span style="font-family:"Courier New",serif;color:black;background:white">(_X3DNode):</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">Is there a pylint?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">Isn't multiple inheritance possible?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">Thanks!</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Courier New",serif;color:black;background:white">John</span><o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
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<a href="mailto:x3d-public@web3d.org">x3d-public@web3d.org</a><br>
<a href="http://web3d.org/mailman/listinfo/x3d-public_web3d.org">http://web3d.org/mailman/listinfo/x3d-public_web3d.org</a><o:p></o:p></p>
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