Remote Rendering with Paraview Example

[staceywhitmore-inl]

From the Trame tutorial, how do I combine the venv Paraview example where I execute my script from pvpython using the following command:

"C:\Program Files\ParaView 5.11.2\bin\pvpython.exe" MyApp.py -venv /c/Path/To/My/Local/miniconda3/envs/trame/

with the remote rendering example so I can run two or more independent client processes with trame tools like in this command:
python -m trame.tools.serve --exec remote_rendering_class:MyClassName
?

I've tried combing the syntax from these two commands but to no avail. (E.g.,

"C:\Program Files\ParaView 5.11.2\bin\pvpython.exe" -m trame.tools.server --exec MyApp:MyClass -venv /c/Path/To/My/Local/miniconda3/envs/trame/

) but naturally 'pvpython isn't your regular python' as has been mentioned. So, accessing trame.tools.server from pvpython is likely not as simple as combining these two commands on the command line.

I just want to be able to serve my app that is rendered by Paraview in two different browsers, performing different actions in each connected client session (rather than the default option in which the two client windows will mirror each other bc they use the same instance). Eventually I would like to render this app on a server from a remote Paraview instance but for now I am just running it from localhost.

I can get each of these two tutorial examples to work on their own I'm just running into the expected dependency issues when I try to combine the two commands in my CLI.

[jourdain]

You might be able to do the following, otherwise you will need to extend PYTHONPATH/PATH

pvpython.exe -m paraview.apps.trame --trame-app trame.tools.server --venv /c/Path/To/My/Local/miniconda3/envs/trame/ --exec MyApp:MyClass

[staceywhitmore-inl]

Good point. Ideally I would just look at an example that combines the lessons taught in the chapter 05_paraview of the Trame tutorial SimpleCone example, encapsulated in the following command
C:\Program Files\ParaView 5.11.2\bin\pvpython.exe" SimpleCone.py --venv C:\Path\To\My\miniconda3\envs\trame\
with the material taught in the remote_rendering_class.py example from the Trame course as executed in the following command
python -m trame.tools.serve --exec remote_rendering_class:Cone
,as simply running the command you mentioned earlier will not work if things are not implemented correctly in the code I'm trying to run, which combines these two concepts.

Are you aware of such a code example or do you know of a good starting place in the documentation that points to the concepts I will need to learn to make this happen?

I can provide a basic code sample of what I'm trying to do if you think that might be helpful as well.

[jourdain]

I guess in the example of chapter 5, we do view = simple.Render() which means every application that get started by each user will share the same view where many cones will be added. Then when the session exit, those cones will stay around. So you will keep adding more cones without removing any of them into the same view that will be shared across all sessions.

First try to get the remote_rendering_class:Cone working in the context of ParaView using the trame.tools.serve either by using the paraview.apps.trame entrypoint or your own that import paraview.web.venv but run trame.tools.serve with your target class...

[jourdain]

At that point it is just python issue, but once that is solved, you can start thinking of the specificity of your ParaView app.

[staceywhitmore-inl]

OK. I got it to work. Wrapping all my code in a class helped! Thanks for your help!
pvpython.exe -m paraview.apps.trame --trame-app trame.tools.serve --venv /c/Path/To/My/Local/miniconda3/envs/trame/ --exec MyApp:MyClass now works!

Also, I think there may have been a typo in your original answer as it lists trame.tools.serve**r** (with an 'r') and trame.tools.serve is what worked for me.

[jourdain]

indeed it is to serve a trame app... https://trame.readthedocs.io/en/latest/tools.serve.html