Python is not downloaded

[TogrulKazimov]

Issue Type: Bug

Creating jupyter notebook file.
print('hello world')
expected: hello world
actual: notification from jupyter notebook - Python is not installed. Please download and install Python in order to execute cells in this notebook.(jupyter extension)
P.S. I have downloaded Python 3.9, selected it as interpreter. It perfectly works in Anaconda's Jupyter.

Extension version: 2021.6.914258744
VS Code version: Code 1.57.0 (b4c1bd0a9b03c749ea011b06c6d2676c8091a70c, 2021-06-09T17:18:42.354Z)
OS version: Windows_NT x64 10.0.19041
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz (4 x 1696)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	5.91GB (2.21GB free)
Process Argv	--crash-reporter-id e4816a9b-156d-4ca1-9430-5b5944115f67
Screen Reader	no
VM	0%

A/B Experiments

vsliv368:30146709
vsreu685:30147344
python383:30185418
pythonvspyt678:30270856
pythonvspyt602:30300191
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes627:30244334
pythonvspyt639:30300192
pythontb:30283811
pythonvspyt551cf:30311713
vspre833:30267464
pythonptprofiler:30281270
vshan820:30294714
pythondataviewer:30285071
vscus158:30286553
pythonvsuse255cf:30319632
vscgsv2:30307504
vscorehov:30309549
vscod805:30301674
binariesv517cf:30312826

[joyceerhl]

Looks like we're creating a dummy no Python controller too eagerly:

vscode-jupyter/src/client/datascience/notebook/noPythonKernelsNotebookController.ts

Lines 56 to 57 in 76ba6be

	if (this.pythonExtensionChecker.isPythonExtensionInstalled) {
	await this.handleExecutionWithoutPython();

Could you please provide the logs from the Jupyter output panel? Thanks!

[rchiodo]

This looks to be the python extension not telling us there are any interpreters.

[paulacamargo25]

Hi, thanks for the bug report, can you please share the Python Output Logs.

[TogrulKazimov]

Looks like we're creating a dummy no Python controller too eagerly:

vscode-jupyter/src/client/datascience/notebook/noPythonKernelsNotebookController.ts

Lines 56 to 57 in 76ba6be

	if (this.pythonExtensionChecker.isPythonExtensionInstalled) {
	await this.handleExecutionWithoutPython();

Could you please provide the logs from the Jupyter output panel? Thanks!

Sorry for the late reply, I did not get check if somebody replied to the issue.

This is the Output panel for Jupyter. Both Jupyter and Python extension says the same thing - "python is not installed".

[TogrulKazimov]

Looks like we're creating a dummy no Python controller too eagerly:

vscode-jupyter/src/client/datascience/notebook/noPythonKernelsNotebookController.ts

Lines 56 to 57 in 76ba6be

	if (this.pythonExtensionChecker.isPythonExtensionInstalled) {
	await this.handleExecutionWithoutPython();

Could you please provide the logs from the Jupyter output panel? Thanks!

Sorry for the late reply, I did not get check if somebody replied to the issue.

This is the Output panel for Jupyter. Both Jupyter and Python extension says the same thing - "python is not installed".

@paulacamargo25

[abhirupa-tech]

Facing the same issue as of today, 20th August, 2021.

Bug: Python interpreter not detected in Jupyter Notebook.

Error message: Python is not installed. Please download and install Python in order to execute cells in this notebook.

Reopening this issue, would like to know what can be done to fix this

[rchiodo]

@Onyxe we'd need to see the logs for the 'jupyter' output tab and the 'python' output tab. One or both of those will have more information.

[karthiknadig]

Might be related microsoft/vscode#131232

There seems to be some issue with installation that seems to hit a few machines.

[paulacamargo25]

Hi @Onyxe can you please update VSCode to the last version and try again?

[brettcannon]

Because we have not heard back with the information we requested, we are closing this issue for now. If you are able to provide the info later on then we will be happy to re-open this issue to pick up where we left off.

[minsa110]

Reopening as it still seems to be an issue

video

FYI @karrtikr @IanMatthewHuff

[karrtikr]

The prompt in the video comes from Jupyter itself, I suspect our APIs are not being re-queried and we're relying on the cache in the previous session for this info.

[rchiodo]

@minsa110 can you post a gif or give more details? We can't seem to open the video.

[minsa110]

Does this video work?

In case it doesn't work... :)

I was working with:

• Windows machine
• VS Code and Jupyter extension is installed, but Python extension is NOT installed

Steps to repro:

1. Create a new ipynb file and click "Run" cell
2. Click "Python 3" from the command palette
3. Follow the prompts to install Python extension (from the popup message, "Python Extension required to run Python notebooks")
4. Click "Run" button again to run cell
5. 🪲 I see a prompt to install Python on my system even when I have Python already on my system
6. 🪲 You have to wait long enough for the extensions to discover kernels / interpreters and for them to show up in the kernel selector (in any case, you'd still have to "Cancel" out of the error message from step 6--when the extensions finally discover kernels / interpreters, it still doesn't X out of the error message automatically)

[IanMatthewHuff]

This is the old flow using the dummy kernel, so I'm not sure if it's worth looking into. Do you see the same issue with new bits with the commands?

[minsa110]

Old flow is not worth looking into + new bits doesn't have the dummy kernel, so closing

[speedbunny]

Issue happening again as of Feb 2023.

[Wang-stables]

I installed the new extension of python and jupyter notebook for VScode and problem had fix. I notice that the extension of Python on VScode had changed recently, maybe it's a hotfix or actually the reason for bug?