[X3D-Ecosystem] Loading into X3DPSAIL (for Maya and Blender)

John Carlson yottzumm at gmail.com
Tue Jan 27 01:57:52 PST 2026 

This works well:
"""





*import importlibmodule =
importlib.import_module("net.x3djsonld.data.abox")if hasattr(module,
'newModel'):    print(module.newModel.XML())*
"""
The model, abox.py, is in the net/x3djsonld/data folder.  Piece of cake.

Fun stuff!  Learned something new about Python!  Don't try this at home, I
don't recommend it at all!

Do I want to do this on the entire archive to test round-tripping?  Maybe
in a virtual machine?  Don, can you make a zip of all the python examples
on the archive? You can direct it straight to me.  I recommend creating an
issue here to upload the zip.
https://github.com/coderextreme/X3DJSONLD/issues

Yeah, I know I'm lazy!

Don't play with matches!

John

On Tue, Jan 27, 2026 at 3:45 AM John Carlson <yottzumm at gmail.com> wrote:

> If I get a real urge, I will come up with a good example of a dynamic
> import if someone else doesn't beat me to it!
>
> Good luck!
>
> John
>
> On Tue, Jan 27, 2026 at 3:43 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> Frankly, the most reliable thing I can think of right now is converting
>> XML to Python, then doing a dynamic import (is there such a thing?), eval
>> of a string the python is read into, or ?  My vote is for dynamic import,
>> if anyone wants to look it up. Here it is from Bing:
>>
>> import importlib
>>
>> module = importlib.import_module(model_file_basename) # load the X3D
>> Python model as a module.
>>
>> Then just test for an attribute/function of the model module with "if
>> hasattr(module, 'newModel'):" and do the right thing, like
>> "module.newModel.XML()" etc.
>>
>> Not tested at all. Use responsibly.
>>
>> So we don't have an XML loader, but we do have a python loader!
>>
>> I'm wondering if Aaron took this approach?
>>
>> Not a security hole if your python or XML comes from trusted sources.
>> Validate and schematron the XML for as much security as X3D can provide.
>> Ultimately, the user has to verify, I think.
>>
>> John
>>
>> On Mon, Jan 26, 2026 at 6:01 PM Don Brutzman <don.brutzman at gmail.com>
>> wrote:
>>
>>> Yes "X3DLoaderDOM.java (load DOM into scenegraph)" was difficult to
>>> write, requires manual coding and time-consuming to debug.  It works and
>>> the generator for it is checked into open source as a key part of X3DJSAIL.
>>>
>>>    -
>>>    https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/X3DLoaderDOM.html
>>>    - (on web3d.org but direct access is blocked, library not is version
>>>    control since it is large and changeable; copy attached)
>>>
>>> The PythonX3dSmokeTests.py program builds a lot of snippets of python
>>> scene graph.  The same approach might be used to walk any X3D tree and
>>> construct a python scene graph.  If such code works, and is reliable, we
>>> can promote that code and integrate it as part of the x3d.py distribution.
>>>
>>>    -
>>>    https://www.web3d.org/x3d/stylesheets/python/examples/PythonX3dSmokeTests.py
>>>
>>> all the best, Don
>>> --
>>> X3D Graphics, Maritime Robotics, Distributed Simulation
>>> Relative Motion Consulting  https://RelativeMotion.info
>>>
>>>
>>> On Mon, Jan 26, 2026 at 2:54 PM John Carlson <yottzumm at gmail.com> wrote:
>>>
>>>> Thanks for fixing the TODO to add XML!
>>>>
>>>> I have tried to add Python code which loads JSON into an X3DPSAIL scene
>>>> graph and failed.  I have zero confidence in my ability to load stuff into
>>>> in memory scene graphs, preferring to load things into DOM first.  This
>>>> applies to much of my work, including JSON validation with X3D XML schema.
>>>>
>>>> I am attempting to load JSON into a CGE scene graph, but there’s no
>>>> real evidence that it works yet.  I have a mostly working DOM solution.
>>>>
>>>> I realize X3DLoaderDOM.java (load DOM into scenegraph) is a lot of
>>>> work, and if this was mostly automated, please tell us how if it’s not
>>>> a national secret.  If we have that, then Python might be a lot easier!
>>>>
>>>> My overall plan is to push JSON things into DOM for loading, but Aaron
>>>> might have a good solution for all encodings!
>>>>
>>>> I am reminded how Xj3D translated XML into a VRML scene graph.  Not
>>>> ideal, but.
>>>>
>>>> My priorities are first CGE, then Blender import.  I realize my
>>>> priorities change a lot.   If we had a way to export into Blender from
>>>> X3DPSAIL, this would make working on X3DPSAIL import much more attractive.
>>>> Easier said than done.
>>>>
>>>> John
>>>>
>>>> On Mon, Jan 26, 2026 at 3:51 PM Don Brutzman <don.brutzman at gmail.com>
>>>> wrote:
>>>>
>>>>> Regarding C/C++/C# open source, no such library has yet been shared.
>>>>> As with our autogenerated Java and Python libraries, these are strong
>>>>> candidates for autogeneration once proper design patterns are written.
>>>>> Once written, library testing using the X3D Example Archives would be
>>>>> essential for success and straightforward to perform.
>>>>>
>>>>> Regarding X3D loaders in Python for X3DPSAIL, none has been written
>>>>> yet.  Please be aware that .x3d files are written in valid XML.  Refreshed
>>>>> TODO list:
>>>>>
>>>>>    - Python X3D Package x3d.py, X3D Python Scene Access Interface
>>>>>    Library (X3DPSAIL)
>>>>>    - The x3d.py Python X3D Package supports programmers with Python
>>>>>    interfaces and objects for standards-based X3D programming, all as open
>>>>>    source.
>>>>>    - https://www.web3d.org/x3d/stylesheets/python/python.html#TODO
>>>>>
>>>>> 🔖 <https://www.web3d.org/x3d/stylesheets/python/python.html#TODO>
>>>>> TODO
>>>>> [image: to top]
>>>>> <https://www.web3d.org/x3d/stylesheets/python/python.html#>
>>>>>
>>>>> Lots! Much progress continues. For a release-summary log, please see history
>>>>> log for this page
>>>>> <https://sourceforge.net/p/x3d/code/32962/log/?path=/www.web3d.org/x3d/stylesheets/python/python.html>
>>>>> .
>>>>>
>>>>>
>>>>>    - *TODO:* clean up x3d.html
>>>>>       <https://www.web3d.org/x3d/stylesheets/python/x3d.html> documentation
>>>>>       autogenerated by pydoc
>>>>>       <https://docs.python.org/3/library/pydoc.html>.
>>>>>       - *TODO:* We need a "Getting Started" tutorial on this page.
>>>>>       This is a good opportunity... who wants to help?!
>>>>>       - *TODO:* utility support for loaders from XML (.x3d or .xml),
>>>>>       ClassicVRML (.x3dv), VRML97 (.wrl), and JSON (.json or .x3dj) files.
>>>>>       - *TODO:* distribution support for Jupyter Notebook
>>>>>       <https://jupyter.org/> (initial example works), Apache Zeppelin
>>>>>       <https://zeppelin.apache.org/> notebook, Anaconda
>>>>>       <https://www.anaconda.com/> distribution of Python, and other
>>>>>       data-science platforms.
>>>>>
>>>>> To facilitate library review, I was recently able to autogenerate
>>>>> Python documentation for x3d.py using the pydoc tool.
>>>>>
>>>>>    - https://www.web3d.org/x3d/stylesheets/python/x3d.html
>>>>>
>>>>> Please note that each X3D node has the following methods listed.
>>>>>
>>>>> Methods defined here:
>>>>>> *HTML5*(self, indentLevel=0)
>>>>>> Provide HTML5 output serialization using modified
>>>>>> XML encoding with no singleton self-closing elements.
>>>>>> *JSON*(self, indentLevel=0, syntax='JSON')
>>>>>> Provide X3D
>>>>>> <https://www.web3d.org/x3d/stylesheets/python/x3d.html#X3D>
>>>>>>  output serialization using JSON encoding (usable for .json file suffix).
>>>>>> *VRML*(self, indentLevel=0, VRML97=False)
>>>>>> Provide X3D
>>>>>> <https://www.web3d.org/x3d/stylesheets/python/x3d.html#X3D>
>>>>>>  output serialization using VRML encoding (usable for .x3dv or .wrl file suffix).
>>>>>> *XML*(self, indentLevel=0, syntax='XML')
>>>>>> Provide Canonical X3D
>>>>>> <https://www.web3d.org/x3d/stylesheets/python/x3d.html#X3D>
>>>>>>  output serialization using XML encoding (usable for .x3d file suffix).
>>>>>
>>>>>
>>>>> Am thinking the HTML5 method is no longer needed, this was written
>>>>> when X3DOM had trouble with self-closing elements.
>>>>>
>>>>> Thanks for all efforts that might improve x3d.py.
>>>>>
>>>>> all the best, Don
>>>>> --
>>>>> X3D Graphics, Maritime Robotics, Distributed Simulation
>>>>> Relative Motion Consulting  https://RelativeMotion.info
>>>>>
>>>>>
>>>>> On Sun, Jan 25, 2026 at 4:18 AM John Carlson <yottzumm at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> I guess I didn't send this earlier.
>>>>>>
>>>>>> I did see the standards progress page.  For C/C++/C#, are any
>>>>>> libraries open source?  I’m thinking COIN 3D, OpenInventor,  H3D.   Maybe
>>>>>> others.  I see there’s an ISO documentation for each language, but
>>>>>> apparently the standard isn’t open source????  I’m looking for
>>>>>> opportunities for X3DJSONLD serialization. OpenInventor (COIN 3D) looks
>>>>>> super complex.
>>>>>>
>>>>>> For X3DPSAIL, can you point me at an example of loading XML or DOM
>>>>>> into a scenegraph? Maybe I missed something????  I’m looking for something
>>>>>> like CreateX3DFromString()???   I realized I can create Python from XML,
>>>>>> just like my tools can go from JSON to DOM to Python; but my toolchain
>>>>>> isn’t Python.   Running stylesheets in Python would be a great example.
>>>>>>
>>>>>> Looking here:
>>>>>>
>>>>>>
>>>>>> https://www.web3d.org/x3d/stylesheets/python/examples/PythonX3dSmokeTests.py
>>>>>>
>>>>>>
>>>>>> On Sun, Jan 25, 2026 at 12:19 AM Don Brutzman <don.brutzman at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Standards planning status appears on the following page.
>>>>>>>
>>>>>>>    - X3D Standards Progress | Web3D Consortium
>>>>>>>    <https://www.web3d.org/x3d/progress>
>>>>>>>    - https://www.web3d.org/x3d/progress
>>>>>>>
>>>>>>> Scroll past overview prose to find links to each version completed,
>>>>>>> in progress and planned.
>>>>>>>
>>>>>>> all the best, Don
>>>>>>> --
>>>>>>> X3D Graphics, Maritime Robotics, Distributed Simulation
>>>>>>> Relative Motion Consulting  https://RelativeMotion.info
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Jan 23, 2026 at 7:44 PM John Carlson via X3D-Ecosystem <
>>>>>>> x3d-ecosystem at web3d.org> wrote:
>>>>>>>
>>>>>>>> A quick search reveals this page:
>>>>>>>>
>>>>>>>> https://wiki.web3d.org/wiki/index.php/X3D_Python_Language_Binding
>>>>>>>>
>>>>>>>>
>>>>>>>> This link on the page is dead?
>>>>>>>>
>>>>>>>> https://github.com/Web3DConsortium/X3D/tree/master/ISO-IEC%2019777
>>>>>>>>
>>>>>>>>
>>>>>>>> Btw: both 19776-4 and 19776-5 are titled JSON encoding?????
>>>>>>>> ==================================
>>>>>>>>
>>>>>>>> I could start writing a Python binding standard?  Except we have
>>>>>>>> three versions, one based on GraalPy/X3DJSAIL and one based on “normal”
>>>>>>>> python-X3DPSAIL, and if course H3D, which AFAIK, has C++ underneath?  I
>>>>>>>> believe CGE may also have plans for Python.
>>>>>>>>
>>>>>>>> GraalPy examples are here:
>>>>>>>>
>>>>>>>>
>>>>>>>> https://github.com/coderextreme/X3DJSONLD/tree/master/src/main/graalpy/net/coderextreme
>>>>>>>>
>>>>>>>> Python examples are on the X3D archives, some duplicated here:
>>>>>>>>
>>>>>>>>
>>>>>>>> https://github.com/coderextreme/X3DJSONLD/tree/master/src/main/python/net/x3djsonld/data
>>>>>>>>
>>>>>>>> It seems like the pure python implementation (pythonic) has more
>>>>>>>> sway and implementations, so I am willing to capitulate, even though, in my
>>>>>>>> experience, X3DJSAIL generates better JSON!  It was never really my idea to
>>>>>>>> go with a pure python version though, but I don’t know how to install
>>>>>>>> GraalPy in Blender!  I will pay anyone $100 if they can make blender run
>>>>>>>> GraalPy for import/export addons on Windows!  I’m guessing X3DPSAIL can run
>>>>>>>> stylesheets as well?  Perhaps it’s time to convert stylesheets to pure
>>>>>>>> Java, with a stylesheet of course!
>>>>>>>>
>>>>>>>> As far as support, GraalPy is supported by Oracle, and Python is
>>>>>>>> supported by Microsoft (Does Guido still work there?).
>>>>>>>>
>>>>>>>> It would be very nice to have a renderer for X3DJSAIL and X3DPSAIL
>>>>>>>> (see previous post)!
>>>>>>>>
>>>>>>>> Has anyone used Xj3D from GraalPy?
>>>>>>>>
>>>>>>>> ==================================
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Jan 23, 2026 at 8:52 PM John Carlson <yottzumm at gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Apologies, I just noticed I meant X3D python binding.
>>>>>>>>>
>>>>>>>>> On Fri, Jan 23, 2026 at 8:50 PM John Carlson <yottzumm at gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> What’s the status of the Python encoding standard?   Would my
>>>>>>>>>> participation help?
>>>>>>>>>>
>>>>>>>>>> Instead of spending time on Blender currently, my thought is to
>>>>>>>>>> go back to developing an “X3D” JSON to CGE scenegraph converter, as that
>>>>>>>>>> can be developed beyond DOM loading.   Does anyone know a good Pascal LLM?
>>>>>>>>>>   I do find begin/end rather tedious.
>>>>>>>>>>
>>>>>>>>>> If there’s a lot of demand for a Blender HAnim export currently,
>>>>>>>>>> I will reconsider.   Or X3D to glTF conversion.
>>>>>>>>>>
>>>>>>>>>> John
>>>>>>>>>>
>>>>>>>>> --
>>>>>>>> X3D-Ecosystem mailing list
>>>>>>>> X3D-Ecosystem at web3d.org
>>>>>>>> http://web3d.org/mailman/listinfo/x3d-ecosystem_web3d.org
>>>>>>>>
>>>>>>>
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