Running cells requires loopback adapter for localhost

[tempegarit]

Environment data

• VS Code version: 1.29.1
• Extension version (available under the Extensions sidebar): 2018.11.0
• OS and version: windows 10
• Python version (& distribution if applicable, e.g. Anaconda): miniconda python 3.7
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): base conda environment
• Relevant/affected Python packages and their versions: jupyter notebooks

Expected behaviour

jupyter notebook is started

Actual behaviour

jupyter notebook didn't start and "Running cells requires Jupyter notebooks to be installed." notification appear even if jupyter notebook has been installed

Steps to reproduce:

1. write some code
   
2. click "run cell"
   
3. this notification appear
   

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

[tempegarit]

i am able to run jupyter notebook from anaconda prompt

[rchiodo]

Are you sure the python you have selected on the bottom left of vscode has jupyter installed? Your console log makes it look like it doesn't.

What happens if you start the 'Python: Start REPL' command and then type

import notebook
notebook.version_info

You should end up with something like this if Jupyter is installed:

Python 3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 10:22:32) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import notebook
>>> notebook.version_info
(5, 7, 2)
>>>

You'll end up with something like this if it isn't:

Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:25:58) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import notebook
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named notebook
>>>

[rchiodo]

This might also be a conda activate problem which might have been fixed in our latest release (released today)

[PushUpek]

I have similar issue, but with pipenv. Looks like jupyter cannot be activated from venv

VS Code version: 2018.12.1

[tempegarit]

Are you sure the python you have selected on the bottom left of vscode has jupyter installed? Your console log makes it look like it doesn't.

What happens if you start the 'Python: Start REPL' command and then type

import notebook
notebook.version_info

You should end up with something like this if Jupyter is installed:

Python 3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 10:22:32) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import notebook
>>> notebook.version_info
(5, 7, 2)
>>>

You'll end up with something like this if it isn't:

Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:25:58) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import notebook
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named notebook
>>>

yes, i am sure the python i have selected on the bottom left of vscode has jupyter installed.

This might also be a conda activate problem which might have been fixed in our latest release (released today)

i have just installed the latest release and then i had different issue.

here is the output of developer tools

[MisLink]

Same issue. Output of dev tool shows the extension doesn't follow the pythonPath config:

My workspace config:

{
    "python.pythonPath": ".venv/bin/python",
}

[rchiodo]

@MisLink you're problem is likely the virtual environment. The workaround for now is run vscode from a terminal window that has '.venv/bin/python' on the path. We still have problems activating non conda virtual environments.

@tempegarit you're problem has me stumped. The insiders build should output more information on your error. Can you try that one? Thanks.

[tempegarit]

@rchiodo sure, but how can i use it? it has .vsix extension. I don't know how to install it.

[rchiodo]

Oh sorry, should have included the vscode instructions:
https://code.visualstudio.com/docs/editor/extension-gallery#_install-from-a-vsix

[tempegarit]

Here are the output:

[rchiodo]

Is Miniconda3 (gamedev) your currently selected python? It looks like our enumeration of the kernelspec is failing. Maybe your installation doesn't include that.

[rchiodo]

I should have been more explicit.

I think this code here (ours) is failing:

https://github.com/Microsoft/vscode-python/blob/2e5e9b5b9eb4363683072ec59cbed7e16e2b1d92/src/client/datascience/jupyter/jupyterExecution.ts#L679

Although the isKernelSpecSupported should be checking this case.

[rchiodo]

Your original error was 'Failed to connect', but this console output shows 'Jupyter notebook failed to launch', so actually I think this is an internal error in the jupyter code (which makes the callstack make more sense)

That would actually be this code here:
https://github.com/Microsoft/vscode-python/blob/2e5e9b5b9eb4363683072ec59cbed7e16e2b1d92/src/client/datascience/jupyter/jupyterSessionManager.ts#L28

I'll try wrapping both in a catch and sending that out. Should be an hour or so.

[rchiodo]

@tempegarit in about half an hour a new insiders build should be available with a potential fix. If you can try it out, that would be great.

Thanks.