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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><div style='mso-element:para-border-div;border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='border:none;padding:0in'>Example of error generated below. (minimal amount of code) Jupyter export attached. I hope you can address the issue sometime with X3DJSAIL. My best guess is that pyjnius is going through getSuperclass() and finding the abstract classes’ method setIS(). We can try deleting getSuperclass call in pyjnius if you think it’s appropriate.</p><p class=MsoNormal style='border:none;padding:0in'> My suggestion is to delete setIS from X3DConcreteNode.java or implement addChild in X3DConcreteNode.java, which may just cascade the error. I think deleting setIS might be preferable, but test both cases. Consider a wrapping, like:</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>Transform(Transform().setIS(IS())).addChild(Shape()) # hasn’t been tested, but ew.</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>A jnius.cast would work similarly. We can go with a cast if you like. Please look into a cast to see what you prefer. Also, try converting to Java.</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>Now do you see where the abstract class is coming from? Do you agree on what’s introducing the abstract class (not me)?</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>Good news is, I and Michael figured out how to run the code in Jupyter Lab (anaconda). There are instructions online that work with the conda.bat command install jnius (see conda install on pyjnius website) WooHoo! Highly recommended, but a bit stilted to start with.</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>Code is back to you! Looking for changes to X3DConcreteNode.java. I can make changes to the serializer if we decide wrapping or casting is appropriate. I just think we’ll be wrapping the wrapping the wrapping. It seems better to me to add or delete abstract methods.</p><p class=MsoNormal style='border:none;padding:0in'><o:p> </o:p></p><p class=MsoNormal style='border:none;padding:0in'>No, I don’t know why @Override didn’t work.</p></div><p class=MsoNormal># This code shows the error</p><p class=MsoNormal>import jnius_config<o:p></o:p></p><p class=MsoNormal>jnius_config.set_classpath('.', 'c:/x3d-code/www.web3d.org/x3d/stylesheets/java/jars/X3DJSAIL.3.3.full.jar')<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>from jnius import autoclass<o:p></o:p></p><p class=MsoNormal>Shape = autoclass('org.web3d.x3d.jsail.Shape.ShapeObject')<o:p></o:p></p><p class=MsoNormal>Transform = autoclass('org.web3d.x3d.jsail.Grouping.TransformObject')<o:p></o:p></p><p class=MsoNormal>IS = autoclass('org.web3d.x3d.jsail.Core.ISObject')<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='border:none;padding:0in'>Transform().setIS(IS()).addChild(Shape())<o:p></o:p></p></div><pre style='word-break:break-all'><span class=ansi-red-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#E75C58'>-------------------------------------------------------------------------</span></b></span><span style='font-family:"var(--jp-code-font-family)",serif'><o:p></o:p></span></pre><pre style='word-break:break-all'><span class=ansi-red-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#E75C58'>AttributeError</span></b></span><span style='font-family:"var(--jp-code-font-family)",serif'> Traceback (most recent call last)<o:p></o:p></span></pre><pre style='word-break:break-all'><span class=ansi-green-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#00A250'><ipython-input-1-62dabff95a4e></span></b></span><span style='font-family:"var(--jp-code-font-family)",serif'> in <span class=ansi-cyan-fg><span style='color:#60C6C8'><module></span></span><o:p></o:p></span></pre><pre style='word-break:break-all'><span class=ansi-green-fg><span style='font-family:"var(--jp-code-font-family)",serif;color:#00A250'> 8</span></span><span style='font-family:"var(--jp-code-font-family)",serif'> <o:p></o:p></span></pre><pre style='word-break:break-all'><span class=ansi-green-fg><span style='font-family:"var(--jp-code-font-family)",serif;color:#00A250'> 9</span></span><span style='font-family:"var(--jp-code-font-family)",serif'> <o:p></o:p></span></pre><pre style='word-break:break-all'><span class=ansi-green-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#00A250'>---> 10</span></b></span><span class=ansi-yellow-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#DDB62B'> </span></b></span><span style='font-family:"var(--jp-code-font-family)",serif'>Transform<span class=ansi-yellow-fg><b><span style='color:#DDB62B'>().</span></b></span>setIS<span class=ansi-yellow-fg><b><span style='color:#DDB62B'>(</span></b></span>IS<span class=ansi-yellow-fg><b><span style='color:#DDB62B'>()).</span></b></span>addChild<span class=ansi-yellow-fg><b><span style='color:#DDB62B'>(</span></b></span>Shape<span class=ansi-yellow-fg><b><span style='color:#DDB62B'>())</span></b></span><o:p></o:p></span></pre><pre style='word-break:break-all'><span style='font-family:"var(--jp-code-font-family)",serif'><o:p> </o:p></span></pre><pre style='word-break:break-all'><span class=ansi-red-fg><b><span style='font-family:"var(--jp-code-font-family)",serif;color:#E75C58'>AttributeError</span></b></span><span style='font-family:"var(--jp-code-font-family)",serif'>: 'org.web3d.x3d.jsail.X3DConcreteNode' object has no attribute 'addChild'<o:p></o:p></span></pre></div></body></html>