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Activating extension 'ms-python.python' failed: command 'python.viewOutput' already exists.
workbench.desktop.main.js:2350 Cannot activate the 'Pylance' extension because its dependency 'Python' failed to activate

I tried to edit a python file with vscode and it shows extension activation failed

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3 Answers 3

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Try disabling all other python extensions in VSCode. I had the same issue because a different Python VS extension was conflicting with the official extension. Here's a link that might be able to help you in more detail.

It's hard to give you a more specific answer for this type of question without knowing more about your setup.

EDIT: Look at the comment thread on this answer if you need more details

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14 Comments

what do you mean "setup" ?
(ie. Whether you have other extensions installed, version of python, whether your ~/.vscode/extensions/ is all configured properly, what your source map looks like, etc) But definitely try just reinstalling, it's often just an issue with a bad file.
i tried reinstalling several times im having this issue for 1 month
i tried all the things i can but still same error
Do you have any other python extensions installed?
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You should go through standard troubleshooting procedures like uninstalling and reinstalling ms-python.python. Check if you have multiple python extensions installed and that you only have one installed. This might give you a bit more detail.

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1

I had this error on remote.

In addition to the jupyter extension, I also installed the pylance extension (on remote); that worked. Nothing else did.

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