py311-ipykernel @6.20.1_0 -- ModuleNotFoundError: No module named 'comm'

[wcvinyard (Bill)]

macbookpro 16" late 2021 M1 Max
OS Ventura 13.2.1

After sudo port selfupdate attempted to start jupyter notebook and start .ipynb file.

jupyter-notebook-3.11 starts but python311 kernel fails to connect.

% jupyter-notebook-3.11
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyter_server/transutils.py:13: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead.
  warnings.warn(warn_msg, FutureWarning)
[I 2023-03-05 12:28:28.090 LabApp] JupyterLab extension loaded from /opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab
[I 2023-03-05 12:28:28.090 LabApp] JupyterLab application directory is /opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab
[I 12:28:28.094 NotebookApp] Serving notebooks from local directory: /Users/.../Library/CloudStorage/.../Documents/analytics/prog_python
[I 12:28:28.094 NotebookApp] Jupyter Notebook 6.4.11 is running at:
[I 12:28:28.094 NotebookApp] http://localhost:8888/?token=243f0d9d4abe1213801e6027f7b9a25acad3298c3da543fb
[I 12:28:28.094 NotebookApp]  or http://127.0.0.1:8888/?token=243f0d9d4abe1213801e6027f7b9a25acad3298c3da543fb
[I 12:28:28.094 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 12:28:28.099 NotebookApp] 
    
    To access the notebook, open this file in a browser:
        file:///Users/.../Library/Jupyter/runtime/nbserver-68309-open.html
    Or copy and paste one of these URLs:
        http://localhost:8888/?token=243f0d9d4abe1213801e6027f7b9a25acad3298c3da543fb
     or http://127.0.0.1:8888/?token=243f0d9d4abe1213801e6027f7b9a25acad3298c3da543fb
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
[I 12:28:42.205 NotebookApp] Kernel started: 2272ec18-8dc7-4363-881b-5a72cc9d3c43, name: python3
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/ipykernel_launcher.py", line 15, in <module>
    from ipykernel import kernelapp as app
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/ipykernel/kernelapp.py", line 51, in <module>
    from .ipkernel import IPythonKernel
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/ipykernel/ipkernel.py", line 13, in <module>
    import comm
ModuleNotFoundError: No module named 'comm'

Here is jupyter-kernelspec list:

% jupyter-kernelspec-3.11 list  
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
Available kernels:
  octave     /Users/billvinyard/Library/Jupyter/kernels/octave
  python3    /opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/kernels/python3
  ir42       /opt/local/share/jupyter/kernels/ir42

[mf2k (Frank Schima)]

Installing py-comm fixes the issue for me.

[reneeotten (Renee Otten)]

py-comm dependency was added in this commit