Language server is not starting

[BeetMacol]

The issue

The language server does not seem to start on any of the reported versions (2023.7.10+). IntelliSense does not show up, hovering over identifiers does not bring up any pop up.

Workaround

Downgrade Pylance to 2023.6.40.

Environment data

• Language Server version: 2023.7.10; 2023.7.20; 2023.7.30
• OS and version: Arch Linux x86_64 with Linux 6.4.4
• Python version: Python 3.11.3
• Python related settings:

"python.analysis.logLevel": "Trace",
"python.defaultInterpreterPath": "/bin/python3",
"python.languageServer": "Pylance",

Logs

Python Language Server

On version 2023.6.40 and lower, a lot of logs appear in this output. For the new versions, only the license text shows up.

Python

Full logs:

2023-07-22 20:30:04.986 [info] Test server listening.
2023-07-22 20:30:04.986 [info] Python interpreter path: /bin/python3
2023-07-22 20:30:05.057 [info] Starting Pylance language server.

VS IntelliCode

IntelliCode, unlike the Python extension, detects and reports the problem. First, a pop up appears with the following message:

Sorry, something went wrong activating IntelliCode support for Python. Please check the "Python" and "VS IntelliCode" output windows for details.

The logs also contain an error, but may not be really helpful in solving the problem:

[...]
Activating Python extension
Language server extension command failed. Exception: Error: command 'python.intellicode.loadLanguageServerExtension' not found
    at e.CommandService.k (vscode-file://vscode-app/usr/lib/code/out/vs/workbench/workbench.desktop.main.js:1512:13402)
    at e.CommandService.executeCommand (vscode-file://vscode-app/usr/lib/code/out/vs/workbench/workbench.desktop.main.js:1512:13318)
Error while activating Python: {}

[rchiodo]

Thanks for the issue. What is your version of the python extension? This might be caused by an older python extension trying to work with a newer pylance extension.

[rchiodo]

For this:

For the new versions, only the license text shows up.

Can you be more specific? What license text shows up?

[mikey-boy]

I experienced the same issues, here's my environment:

• Language Server version: 2023.7.40
• Python Extension version: 2023.12.0
• OSS Code version: 1.79.2
• OS and version: Arch Linux x86_64 with Linux 6.4.6
• Python version: Python 3.11.3

And by license text OP is referring to this:

2023-07-31 21:05:54.445 [info] (Client) You may install and use any number of copies ... or transfer the software or this agreement to any third party.

[rchiodo]

I believe Pylance doesn't work with the OSS version of VS code. The license prevents this:
https://marketplace.visualstudio.com/items/ms-python.vscode-pylance/license.

You might have to switch to using Pyright instead.

[johnmwu]

For posterity, I am also seeing this issue on Arch Linux.

[rchiodo]

@johnmwu you might be hitting this issue here (if you're using the official VS code): #5084

[Gorddd]

Switching Color Theme to Dark+ may help

[krisutofu]

For anyone, who initially installed Code OSS like me (not knowing the differences) Pylyzer is another language server for Python which is usable with Code OSS (except it's not so usable with virtual environments maybe).