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I'm trying to use jupyter-notebook in vs-code with the newest python extension, but always fail to launch jupyter notebook server

The jupyter notebook was installed by anoconda, and it works if i just type 'jupyter notebook' in cmd window.

Jupyter notebook failed to launch. Error: The Jupyter notebook server failed to launch in time

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  • Hey Yi Wang. I'm a developer on this extension. One of the first things to check would be if you could launch from the command line, but I see that you've already done that. Could you look at the output of the console log of the developer tools console? That should have information that could help me diagnose this. Commented Oct 14, 2019 at 15:51
  • Sorry was on vacation, so the log was like: Jupyter notebook failed to launch. Error: The Jupyter notebook server failed to launch in time onDidNotificationChange @ notificationsAlerts.ts:40 Commented Oct 26, 2019 at 10:38
  • Get Interpreters, Class name = g, completed in 3ms, Arg 1: <Uri:d:\vs_codes>, Return Value: [{"architecture":3,"path":"D:\\Anaconda\\python.exe","version":{"options":{"loose":false,"includePrerelease":false},"loose":false,"raw":"3.7.1-final","major":3,"minor":7,"patch":1,"prerelease":["final"],"build":[],"version":"3.7.1-final"},"sysPrefix":"D:\\Anaconda","fileHash":"20a12b8440e36230d613de12438abb4e6ac0690237a50edca097d99cb8754fe032c98cbd29c443110cb9324af699d7fda347f8b70fb0c2cba4cb1cace7248ee6","companyDisplayName":"Anaconda, Inc.","type":"Conda","envName":"base","envPath":"D:\\Anaconda"}] Commented Oct 26, 2019 at 10:39
  • That looks like just part of the developer tools output. Do you happen to see anything in the console log (or you could send the whole log to ianhu [at] microsoft.com) about conda activation failing? We're dealing with a few different conda activation issue currently and my suspicion is that you are running into one of these. If it is conda issues, the last comment on this thread might be helpful: github.com/microsoft/vscode-python/issues/8085 Commented Oct 29, 2019 at 17:14
  • Hi, i'm not familiar with these stuff, so how do I get the log you said? Commented Oct 31, 2019 at 14:02

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Yi Wang and I worked on debugging this over e-mail, but putting the answer back here on SO to make sure that anyone else hitting this issues sees it. The issue here was that the Python Path setting in vscode was set to point to pythonw.exe and not python.exe. I'm going to file an issue on the VSCode extension to provide a better warning in this situation.

Thanks again Yi Want for providing the logs that let us debug this.

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