python interpreter selection

[dietman325]

Type: Bug

I cannot activate the virtual environment created with venv in vscode.
I was able to activate it by entering the relative path of python.exe (/venv/Scripts/python.exe) in the cmdlet.

VS Code version: Code 1.101.0 (dfaf44141ea9deb3b4096f7cd6d24e00c147a4b1, 2025-06-11T15:00:50.123Z)
OS version: Windows_NT x64 10.0.26100
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 5 5500 (12 x 3593)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	63.89GB (54.64GB free)
Process Argv	--crash-reporter-id 5ee3153f-4b37-4182-bd48-3f4e019682d7
Screen Reader	no
VM	0%

Extensions (18)

Extension	Author (truncated)	Version
vscode-markdownlint	Dav	0.60.0
gc-excelviewer	Gra	4.2.63
ecdc	mit	1.8.0
vscode-language-pack-ja	MS-	1.101.2025061109
debugpy	ms-	2025.8.0
python	ms-	2025.8.0
vscode-pylance	ms-	2025.6.1
remote-containers	ms-	0.417.0
remote-ssh	ms-	0.120.0
remote-ssh-edit	ms-	0.87.0
cmake-tools	ms-	1.20.53
powershell	ms-	2025.0.0
remote-explorer	ms-	0.5.0
roo-cline	Roo	3.21.0
cmake	twx	0.0.17
html-snippets	wsc	1.0.6
markdown-pdf	yza	1.5.0
json	Zai	2.0.2

A/B Experiments

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nesew1to5:31323296
1292j425:31329156
id45c886:31329544

[lwing01]

vscode version: 1.101.0
python extension version: v2025.8.0

Using workspace mode, multiple code repositories are added to the same workspace, with each repository maintaining its own Python virtual environment (.venv).

1. By using Ctrl + ` to open the terminal in a specified directory, the terminal shows the (.venv) identifier, indicating that the virtual environment is activated. However, when using the which python command to check the Python interpreter path, it displays the system's Python interpreter rather than the one in the virtual environment.

2. Manually activating the virtual environment using the command source ./.venv/bin/activate shows the terminal with the (.venv)(.venv) identifier. After this, using the which python command to check the Python interpreter path correctly displays the interpreter from the virtual environment.

[eleanorjboyd]

Hello! Could you try installing the new "python environments extension" by publisher Microsoft, reloading and seeing if that makes a difference. This is our rewrite on environment management that handles activation and may solve your issue or at least get you onto the newest code for activation.

[github-actions]

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.

Happy Coding!