GitHub
github.com › microsoft › vscode-jupyter › issues › 10952
Failed to install python extension · Issue #10952 · microsoft/vscode-jupyter
July 27, 2022 - User belongs to experiment group 'jupyterTestcf' User belongs to experiment group 'jupyterEnhancedDataViewer' info 8:29:17.408: LSP Notebooks experiment is disabled -- not using Pylance info 8:29:17.513: Preferred Remote kernel for Untitled-1.ipynb is undefined info 8:29:17.513: Find preferred kernel for Untitled-1.ipynb with metadata {"orig_nbformat":4} & preferred interpreter info 8:29:17.519: Preferred Remote kernel for Untitled-1.ipynb is undefined info 8:29:17.519: Find preferred kernel for Untitled-1.ipynb with metadata {"orig_nbformat":4} & preferred interpreter info 8:29:17.524: Preferred Remote kernel for Untitled-1.ipynb is undefined error 8:30:31.690: Failed to install Python Extension via Kernel Picker command warn 8:30:31.695: DataScience Error [Error: Failed to install the Python Extension.
Author meganrogge
GitHub
github.com › microsoft › vscode-jupyter › issues › 13878
Installing Python extension from Kernel picker results in an error · Issue #13878 · microsoft/vscode-jupyter
July 7, 2023 - vanilla OS (Windows or macOS) Install Jupyter extension Open a notebook, select kernel It suggests to install the Python extensions, run it At the end, it successfully installed Python extension but then Jupyter showed an error message “...
Author DonJayamanne
"Failed to find a kernel to run the code. Please install the Jupyter extension"
Trying the interpreter mode and always get these messages when trying something… The thing is I installed the “Jupyter” extension already lol. I’m not familiar with Python though (using С#), just installed this extension but it didn’t help. Any tips? More on forum.cursor.com
10
1
March 25, 2024Jupyter cannot find any kernel, or even the Python extension.
Type: Bug I find my Jupyter doesn't seem to find any Python installation locally, even though there were multiple conda environments and base python from system. This happened to both my Macboo... More on github.com
13
September 5, 2024How to fix "Failed to install the python extension" despite python program being installed.
After activate VS code app and open my python file (.ipynb), I need to select Kernel, after then I selected Python environment, and VS code app is try to install python, however the app keep on looking for something for install python despite that the… More on learn.microsoft.com
1
0
September 11, 2025VSCode suddenly unable to find or start python jupyter kernels
Applies To Notebooks (.ipynb files) Interactive Window and/or Cell Scripts (.py files with #%% markers) What happened? Created a new notebook, and attempted to select a kernel and run a cell. The k... More on github.com
9
June 19, 2024Videos
GitHub
github.com › microsoft › vscode › issues › 267367
Cannot find Python kernel for jupyter notebook after installing R kernel · Issue #267367 · microsoft/vscode
September 18, 2025 - 10:44:08.820 [error] Failed to install Python Extension via Kernel Picker command 10:44:08.822 [warn] DataScience Error [Error: Failed to install the Python Extension.
Author ekernf01
Cursor
forum.cursor.com › support › help
"Failed to find a kernel to run the code. Please install the Jupyter extension" - Help - Cursor - Community Forum
March 25, 2024 - Trying the interpreter mode and always get these messages when trying something… The thing is I installed the “Jupyter” extension already lol. I’m not familiar with Python though (using С#), just installed this extension…
GitHub
github.com › microsoft › vscode-jupyter › issues › 16019
Jupyter cannot find any kernel, or even the Python extension. · Issue #16019 · microsoft/vscode-jupyter
September 5, 2024 - at Fy.installPythonExtensionViaKernelPicker (/home/~/.vscode-insiders/extensions/ms-toolsai.jupyter-2024.7.0-linux-x64/dist/extension.node.js:304:34577) at h (/usr/share/code-insiders/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:161:210546) 22:31:05.468 [error] Failed to install Python Extension via Kernel Picker command 22:31:05.469 [warn] DataScience Error Error: Failed to install the Python Extension.
Author Jacfger
GitHub
github.com › microsoft › vscode-jupyter › issues › 13132
Unable to install Python extension via the Kernel Picker · Issue #13132 · microsoft/vscode-jupyter
Open a dev container Install Jupyter and remove Python extension Open a notebook Go into the kernel picker and select Python Environments Verify Install Python Extenison appears in the quick pick S...
Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5552153 › how-to-fix-failed-to-install-the-python-extension
How to fix "Failed to install the python extension" despite python program being installed. - Microsoft Q&A
September 11, 2025 - After activate VS code app and open my python file (.ipynb), I need to select Kernel, after then I selected Python environment, and VS code app is try to install python, however the app keep on looking for something for install python despite that the python program actually being installed, and eventually show error message: failed to install the python extension.
GitHub
github.com › microsoft › vscode-jupyter › issues › 15783
VSCode suddenly unable to find or start python jupyter kernels · Issue #15783 · microsoft/vscode-jupyter
June 19, 2024 - at ab.installPythonExtensionViaKernelPicker (/home/~/.vscode/extensions/ms-toolsai.jupyter-2024.5.0-linux-x64/dist/extension.node.js:314:34577) at h (/snap/code/162/usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:153:200468) 08:53:40.742 [error] Failed to install Python Extension via Kernel Picker command 08:53:40.743 [warn] DataScience Error Error: Failed to install the Python Extension.
Author zacps
Lightrun
lightrun.com › answers › microsoft-vscode-jupyter-failed-to-install-python-extension
Failed to install python extension
User belongs to experiment group 'jupyterTestcf' User belongs to experiment group 'jupyterEnhancedDataViewer' info 8:29:17.408: LSP Notebooks experiment is disabled -- not using Pylance info 8:29:17.513: Preferred Remote kernel for Untitled-1.ipynb is undefined info 8:29:17.513: Find preferred kernel for Untitled-1.ipynb with metadata {"orig_nbformat":4} & preferred interpreter info 8:29:17.519: Preferred Remote kernel for Untitled-1.ipynb is undefined info 8:29:17.519: Find preferred kernel for Untitled-1.ipynb with metadata {"orig_nbformat":4} & preferred interpreter info 8:29:17.524: Preferred Remote kernel for Untitled-1.ipynb is undefined error 8:30:31.690: Failed to install Python Extension via Kernel Picker command warn 8:30:31.695: DataScience Error [Error: Failed to install the Python Extension.
GitHub
github.com › microsoft › vscode-remote-release › issues › 7265
Unable to Install Python extension in VS code for WSL · Issue #7265 · microsoft/vscode-remote-release
September 29, 2022 - at _.installPythonExtensionViaKernelPicker (/home/codeastra/.vscode-server/extensions/ms-toolsai.jupyter-2022.8.1002431955/out/extension.node.js:2:2407793) at async c._executeContributedCommand (/home/codeastra/.vscode-server/bin/74b1f979648cc44d385a2286793c226e611f59e7/out/vs/workbench/api/node/extensionHostProcess.js:85:63762)] info 11:16:27.335: Preferred Remote kernel for /home/codeastra/notebooks/Untitled.ipynb is undefined info 11:16:27.413: Preferred Remote kernel for /home/codeastra/notebooks/Untitled.ipynb is undefined info 11:16:27.413: Find preferred kernel for /home/codeastra/noteb
Author codeastra2
GitHub
github.com › microsoft › vscode-jupyter › issues › 16234
VSCode unable to find or start python jupyter kernels if python extension runs in a separate extension host process · Issue #16234 · microsoft/vscode-jupyter
November 18, 2024 - at ab.installPythonExtensionViaKernelPicker (/home/~/.vscode/extensions/ms-toolsai.jupyter-2024.5.0-linux-x64/dist/extension.node.js:314:34577) at h (/snap/code/162/usr/share/code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:153:200468) 08:53:40.742 [error] Failed to install Python Extension via Kernel Picker command 08:53:40.743 [warn] DataScience Error Error: Failed to install the Python Extension.
Visual Studio Code
code.visualstudio.com › docs › datascience › jupyter-kernel-management
Manage Jupyter Kernels in VS Code
November 3, 2021 - Also ensure that the Jupyter extension is also installed. Go to the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)), select Codespaces: Sign In and follow the steps to sign into Codespaces. Open the kernel picker by clicking on Select Kernel on the upper right-hand corner of your notebook, select Connect to Codespace.
Top answer 1 of 13
31
I got the same error message because the jupyter package was missing in my selected environment.
pip install jupyter
resolved the problem for me.
From the official VS Code documentation:
To work with Python in Jupyter Notebooks, you must activate an Anaconda environment in VS Code, or another Python environment in which you've installed the Jupyter package.
2 of 13
21
Could you try to reinstall the pyzmq module?
pip uninstall pyzmq
pip install pyzmq==19.0.2
The version number may be different depending on the jupyter-client version.
GitHub
github.com › microsoft › vscode-jupyter › issues › 14040
Jupyter does not detect python extension · Issue #14040 · microsoft/vscode-jupyter
August 2, 2023 - Workspace folder c:\Code, Home = c:\Users\Anton Bogun 18:52:41.566 [info] User belongs to experiment group 'FastKernelPicker' 18:52:41.566 [info] User belongs to experiment group 'NewRemoteUriStorage' 18:52:41.566 [info] User belongs to experiment group 'PasswordManager' 18:52:41.824 [info] Start refreshing Kernel Picker (1690991561824) 18:52:41.835 [info] Using Pylance 18:52:41.876 [info] End refreshing Kernel Picker (1690991561824) 18:52:51.772 [info] No controller selected for Interactive Window initilization 18:52:51.831 [info] Process Execution: python "c:\Users\<username>\.vscode\extensions\ms-toolsai.jupyter-2023.6.1101941928-win32-x64\pythonFiles\normalizeSelection.py"
Author AntonBogun
Reddit
reddit.com › r/learnpython › no kernels to select from in vs code
r/learnpython on Reddit: No kernels to select from in VS Code
April 3, 2025 -
Hello Everybody!
I am using VS Code to program in python / sympy, which works no problem. However, when I shut down VS Code and turn it back on, there are no kernels to select from. VS Code recommends me to install python, but I already have it installed.
I have tried many different approaches with the help of ChatGPT, but the only solution I have found to work is to completely delete everything VS Code from my computer and redownload it. But this approach just isn't viable if I have to do it every time I want to code.
Any help is greatly appreciated!
Top answer 1 of 3
2
Is VSCode asking you to download Python itself, or the Python extension?
2 of 3
1
I HOPE this helps someone since I have been stuck with this for too long! I tried reinstalling VSC, restarting my computer, uninstalling extensions, forcing the environment to be a kernel and activating it: NOTHING WORKED. I found a solution based in installing a downgraded version of Jupyter extension, I tried it with a version around October 2023 but I did not work neither BUT I just swiped for a version released 2 months ago from now and IT DID WORK! It was all just about Jupyter extension version. So if you are reading this and you already tried changing the version, please give it another try with other different versions until you get the one. Good luck!!
GitHub
github.com › microsoft › vscode-jupyter › issues › 10960
'Install Python' command is showing up in kernel picker even when python extension is installed · Issue #10960 · microsoft/vscode-jupyter
July 27, 2022 - Not sure how, but all I did was reload the VS code window. It wasn't there before the reload. After python finishes discovering all of the interpreters, it goes away.
Arch Linux Forums
bbs.archlinux.org › viewtopic.php
[SOLVED] VS Code, after upgrading: Python extension fails to load...? / Applications & Desktop Environments / Arch Linux Forums
Its package.json#enabledApiProposals-property declares: but NOT telemetryLogger. The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api ms-python.python.
GitHub
github.com › microsoft › vscode-python › issues › 25146
Kernel picker wrongly displays `Python 2.7.undefined` for a valid `Python 3.12` kernel · Issue #25146 · microsoft/vscode-python
May 12, 2025 - I run VSCode through the the latest code-server version in a containerized environment with Python 3.12.9 installed at /usr/local/bin/python. Yet at startup of the jupyter extension, the kernel picker does select the good Python environment but wrongly labels it Python 2.7.undefined for some reason.
Published May 12, 2025
Author avouacr