Could not connect python3 kernel to Polyglot notebook

[renbud]

Describe the bug

Please provide as much information as you can.

Please complete the following:

Which version of .NET Interactive are you using? (In a notebook, run the #!about magic command. ):

• OS
  • [X ] Windows 11
  • [ ] Windows 10
  • [ ] macOS
  • [ ] Linux (Please specify distro)
  • [ ] iOS
  • [ ] Android
• Browser
  • [ X] Chrome
  • [ ] Edge
  • [ ] Firefox
  • [ ] Safari
• Frontend
  • [ X] Jupyter Notebook
  • [ ] Jupyter Lab
  • [ ] nteract
  • [X ] Visual Studio Code
  • [ ] Visual Studio Code Insiders
  • [ ] Visual Studio
  • [ ] Other (please specify)

#

I installed python 3.12 using miniconda and created an environment called demo1 with jupyterlab and pandas. This environment works with a regular jupyter notebook in VSCode and also with jupyter lab. I also want to use powershell and SQL Server in a notebook, so I installed the Polyglot Notebook extension. This works fine for C# and SQL etc. But I also want to use python in the same notebook,. However: I could not get the following command to work: #!connect jupyter --kernel-name demo1 --conda-env demo1 --kernel-spec python3

I tried putting the path to python in my PATH variable and tried with and without the conda-env, different kernel names. Nothing works. I even tried using the URL and token parameters and pointing to the jupyter-labs server URL but got a permissions error.

[xela-trawets]

I had the same issue with python. Julia and R were straightforward to get connected up. But Python was a battle to get going. So many missing environment paths, so many binaries, connected by magic strings. In the end the following was useful

pip install ipykernel python -m ipykernel install --user --name=mykernelspec (thanks to https://github.com/dotnet/interactive/issues/3478)

ending up with the following "magic command" in dotnet interactive: #!connect jupyter --kernel-name mykernelspec --kernel-spec mykernelspec

here is my limited understanding... The ipykernel is the "engine", and that needs to be "pip installed" Dotnet interactive starts the ipykernel by looking in the kernel.json file I put the explicit path to python in the kernel definition; here is the mykernelspec\kernel.json:

{ "argv": [ "C:\path\python.exe", "-m", "ipykernel_launcher", "-f", "{connection_file}" ], "display_name": "mykernelspec", "language": "python", "metadata": { "debugger": true } }

Unclear how the kernel.json paths are communicated to dotnet interactive, but it works. The driving points for me as a dotnet developer are to be able work with my python coworkers, and use matplotlib etc. Looking forward to working flexibly with C# and Python.

[webteckie]

@renbud you may want to check out https://github.com/dotnet/interactive/issues/3397 Specifically, see if the following helps: https://github.com/dotnet/interactive/issues/3397#issuecomment-2023152891

[jonsequitur]

This should be resolved by #3781 which is now available in VS Code Insiders.