Code Completion in adjacent cells is slow/non existent

[corman44]

Issue Type: Bug

Create Jupyter notebook, import requests, Shift+Enter to run and create new Cell, type "r = req" and press Ctrl+Space to attempt code completion. No Suggestions are available

Extension version: 2020.12.414227025
VS Code version: Code 1.52.1 (ea3859d4ba2f3e577a159bc91e3074c5d85c0523, 2020-12-16T16:32:10.090Z)
OS version: Linux x64 5.4.0-58-generic snap

System Info

Item	Value
CPUs	Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz (4 x 3700)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on protected_video_decode: unavailable_off rasterization: disabled_software skia_renderer: enabled_on video_decode: unavailable_off vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	0, 0, 0
Memory (System)	7.72GB (1.83GB free)
Process Argv	--force-user-env --no-sandbox --unity-launch --no-sandbox --crash-reporter-id a5791e2f-e43f-45ab-84a7-8e7a11f52bda
Screen Reader	no
VM	0%
DESKTOP_SESSION	ubuntu
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	ubuntu
XDG_SESSION_TYPE	x11

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
openlogontheside:30221877
python763:30178808
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
python504:30227505
vswsl492cf:30211402
wsl2prompt:30224612
pythonvsdeb440cf:30237828
unusedpromptcf:30224611
folderexplorer:30224614
openfilemenu:30224647
pythonvsded773:30236629
vsjup459cf:30237188

[joyceerhl]

Hi @corman44! Which Python language server are you currently using? You can check this value in your settings.json:

  "python.languageServer"

[corman44]

Hi @joyceerhl Jedi is defined. Is this the default for VS Code on Ubuntu 20.04? I have not edited this setting
"python.languageServer": "Jedi"

[joyceerhl]

That is the default, but if you switch it to Pylance and install the recommended Pylance extension, does code completion improve?

[HaleTom]

I have the same issue with "python.languageServer": "Pylance".

See more generic issue: Pylance / Language server support #4307

[HaleTom]

Previous art: https://stackoverflow.com/questions/65561436/pylance-not-working-in-vscode-jupyter-notebooks

[corman44]

Hi @joyceerhl, code completion seems to be working after switching to Pylance. Thank you for the support!