Requires Python 2.7 ipykernel to be installed when opening Python 3 notebook
See original GitHub issueEnvironment data
- VS Code version: 1.53.2 (commit: 622cb03f7e070a9670c94bae1a45d78d7181fbd4)
- Jupyter Extension version (available under the Extensions sidebar): v2021.2.576440691
- Python Extension version (available under the Extensions sidebar): v2021.2.582707922
- OS and version: Ubuntu 20.04 (Linux x64 5.4.0-66-generic)
- Python and/or Anaconda version: Python 3.8.5 and Python 2.7.18
- Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
- Jupyter server running: Local
Detailed VS Code version information:
Version: 1.53.2
Commit: 622cb03f7e070a9670c94bae1a45d78d7181fbd4
Date: 2021-02-11T11:48:44.518Z
Electron: 11.2.1
Chrome: 87.0.4280.141
Node.js: 12.18.3
V8: 8.7.220.31-electron.0
OS: Linux x64 5.4.0-66-generic
Expected behaviour
Start automatically the IPython kernel for the trusted Python 3 notebook while opening the notebook. Run cells after clicking on the “Run cell” button.
(Before updating VS Code everything worked as expected.)
Actual behaviour
Error message “Python 2.7.18 64-bit requires ipykernel to be installed.” appears at startup and each time one tries to run a cell. Actually, the cells do not get executed until one closes the error message by clicking on the “x”.
Steps to reproduce:
- Start the Jupyter server by running
jupyter notebook
in a terminal. Open its web interface in a browser. - Create a new Python 3 notebook. Add a cell or more, e.g. a cell with
1+1
. - Close the notebook in the web interface.
- Start VS Code and open the notebook. Try to run the cell with the “Run cell” button.
Here is a part of the source of one of my notebooks. As far as I know, these metadata show clearly that it is a Python 3 notebook.
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.8.5-final"
},
"toc-autonumbering": true
},
"nbformat": 4,
"nbformat_minor": 4
}
Logs
Output for Jupyter
in the Output
panel (View
→Output
, change the drop-down the upper-right of the Output
panel to Jupyter
)
> /usr/bin/python ~/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/pythonFiles/pyvsc-run-isolated.py -c "import ipykernel" > /usr/bin/python ~/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/pythonFiles/pyvsc-run-isolated.py -c "import ipykernel" Error 2021-02-24 20:00:40: Find kernel spec, Class name = L, completed in 40748ms, has a falsy return value, Arg 1: <Uri:/home/ma/[...]/Untitled.ipynb>, Arg 2: {"kernelspec":{"display_name":"Python 3","language":"python","name":"python3"},"language_info":{"codemirror_mode":{"name":"ipython","version":3},"file_extension":".py","mimetype":"text/x-python","name":"python","nbconvert_exporter":"python","pygments_lexer":"ipython3","version":"3.8.5"}}, Arg 3: undefined, Arg 4: undefined, Return Value: undefined [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } Error 2021-02-24 20:00:40: Get preferred local kernel connection, Class name = L, completed in 40749ms, has a falsy return value [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } Error 2021-02-24 20:00:40: Failed to determine if a notebook is active for the current editor [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } Error 2021-02-24 20:00:40: Failed to determine if a notebook is active for the current editor [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } Error 2021-02-24 20:00:40: DataScience Error [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } } Error 2021-02-24 20:01:20: Exception attempting to start notebook: [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 } Error 2021-02-24 20:01:20: DataScience Error [a [Error]: IPyKernel not installed into interpreter Python 2.7.18 64-bit:/usr/bin/python at L.installDependenciesIntoInterpreter (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:223195) at processTicksAndRejections (internal/process/task_queues.js:97:5) at async L.getKernelForLocalRawConnection (/home/ma/.vscode/extensions/ms-toolsai.jupyter-2021.2.576440691/out/client/extension.js:1:222022)] { category: 'noipykernel', reason: 1 }
Possible origin of the problem
This output indicates that the problem might be that the extension executes /usr/bin/python
also for Python 3 notebooks, while /usr/bin/python
is actually Python 2 on Ubuntu 20.04. In the Ubuntu 20.04 release notes the following information can be found:
/usr/bin/python is not present by default on any new installs. On systems upgraded from previous releases, /usr/bin/python will continue to point to python2 for compatibility.
Screenshot
Issue Analytics
- State:
- Created 3 years ago
- Reactions:2
- Comments:56 (25 by maintainers)
Top GitHub Comments
Ah okay, I thought you meant a log file somewhere.
Here it is:
Having a new issue for a new bug sounds good to me! 🙂
Thanks a lot for fixing the bug!