"Python" (ms-python.python)

[flor187]

Type: Bug

Behaviour

Subject: "Python: Run Selection/Line in Python Terminal" not working after 2025-07-29 update

Description of the issue:
I am experiencing an issue where the command "Python: Run Selection/Line in Python Terminal" (triggered by Shift+Enter or via the Command Palette) no longer functions. When attempting to use this feature, no new terminal opens, and the selected code is not executed.

Expected behavior:
When using "Python: Run Selection/Line in Python Terminal", a new integrated terminal should open (or an existing one should be used) to execute the selected line or block of Python code, with the active Conda environment correctly initialized.

Observed behavior:
Upon executing the command, nothing visibly happens in the VS Code UI (no new terminal appears, no code execution). The problem does not occur when running the entire Python script, which executes correctly in the integrated terminal using my Conda environment. Interactive execution in the "Python Interactive Window" also works as expected (after ensuring ipykernel is installed). This issue is specific to the "Run Selection/Line in Python Terminal" functionality.

Output from "Output" panel (Python section) when trying to run selection:
(Note: The timestamp and exact path may vary, but the core message structure is consistent.)

Troubleshooting steps already attempted:
I have thoroughly troubleshooted this issue, including:

1. Ensuring conda init powershell was run and verified.
2. Checking and setting Set-ExecutionPolicy RemoteSigned -Scope CurrentUser for PowerShell.
3. Confirming the correct Conda environment (avert_py310 with Python 3.10) is selected in VS Code.
4. Installing ipykernel in the active Conda environment.
5. Cleaning Conda cache (conda clean --all).
6. Verifying and removing old Python 3.8-related certifi paths from system/user environment variables (REQUESTS_CA_BUNDLE, CURL_CA_BUNDLE, SSL_CERT_FILE).
7. Reinstalling certifi and requests within the Conda environment.
8. Completely uninstalling and reinstalling VS Code and all extensions (including Python extension).
9. Reinstalling the Python extension from Microsoft.
10. Verifying python.terminal.activateEnvironment is true.
11. Verifying terminal.integrated.defaultProfile.windows is PowerShell.
12. Checking launch.json console setting (integratedTerminal).
13. My Conda environments are the only Python installations on the system now (old Python 3.8 standalone was uninstalled).

Environment details:

• VS Code Version: [Inserează aici versiunea ta de VS Code, de ex. 1.90.2]
• Python Extension Version: 2025.10.1 (Last Released: 2025-07-29, 13:50:02)
• Python Version (in Conda environment): Python 3.10
• Conda/Miniconda Version: [Inserează aici versiunea ta de Conda, de ex. 25.3.1 - o găsești în outputul erorii anterioare sau rulând conda --version]
• Operating System: Windows 10/11 (Specifică-ți versiunea exactă, de ex., Windows 11 Pro 23H2)

---

Thank you for your time and assistance!

Extension version: 2025.10.1
VS Code version: Code 1.102.3 (488a1f239235055e34e673291fb8d8c810886f81, 2025-07-29T03:00:23.339Z)
OS version: Windows_NT x64 10.0.26100
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.13.2
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Conda
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

Installed Extensions

Extension Name	Extension Id	Version
debugpy	ms-	2025.10.0
js-debug	ms-	1.102.0
js-debug-companion	ms-	1.1.3
jupyter	ms-	2025.6.0
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.3.0
python	ms-	2025.10.1
vsc-python-indent	Kev	1.21.0
vscode-js-profile-table	ms-	1.0.10
vscode-jupyter-cell-tags	ms-	0.1.9
vscode-jupyter-slideshow	ms-	0.1.6
vscode-pylance	ms-	2025.7.1
vscode-python-envs	ms-	1.2.0

System Info

Item	Value
CPUs	12th Gen Intel(R) Core(TM) i7-1255U (12 x 2611)
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)	15.70GB (3.94GB free)
Process Argv	--crash-reporter-id 26808c81-652b-4e7b-aefd-42b468b714c0
Screen Reader	no
VM	50%

A/B Experiments

vsliv368cf:30146710
binariesv615:30325510
2e7ec940:31000449
nativeloc1:31344060
dwcopilot:31170013
6074i472:31201624
dwoutputs:31242946
hdaa2157:31222309
copilot_t_ci:31333650
e5gg6876:31282496
pythoneinst12:31285622
c7cif404:31314491
996jf627:31283433
pythonrdcb7:31342333
usemplatestapi:31297334
0aa6g176:31307128
747dc170:31275177
aj953862:31281341
generatesymbolt:31295002
convertfstringf:31295003
9d2cg352:31346308
usemarketplace:31343026
nesew2to5:31336538
agentclaude:31350858
4f60g487:31327383
nes-diff-11:31337487
replacestringexc:31350595
nes-set-on:31351930
6abeh943:31336334
envsactivate1:31353494
yijiwantestdri0626-t:31336930
0927b901:31350571
ji9b5146:31348712
8gib2676:31356126
0cj2b977:31352657

[riddhimanjrekar]

@flor187
Hello!
I am Riddhi Manjrekar. plz assign this issue to me.

[eleanorjboyd]

Hi! Do you have the ptyhon environments extension installed (you would see a python icon in the sidebar if so. If you could toggle it on or off based on doing the opposite of when you just had it. If you don;t see the Python icon, you may need to add the setting "python.useEnvironmentsExtension": true. Thanks and let me know if this makes a difference

[eleanorjboyd]

@riddhimanjrekar always excited for contributors!

[RobsAEvilGenius]

Hi! Do you have the ptyhon environments extension installed (you would see a python icon in the sidebar if so. If you could toggle it on or off based on doing the opposite of when you just had it. If you don;t see the Python icon, you may need to add the setting "python.useEnvironmentsExtension": true. Thanks and let me know if this makes a difference

I had the same issue, disabling the Environment extension and restarting Extension manager has appeared to have resolved the issue

[alhkmthasm]

Welcome to the encrypted algorithms steal anyone solve it

@riddhimanjrekar always excited for contributors!

[flor187]

From extensions manager (VS Code) I have choosen an older version of ms,python.
It works fine but I'm not on the latest version of ms.python.

[riddhimanjrekar]

1. Check settings.json for REPL / terminal settings
2. Search for “Send to Native REPL” in settings and disable it
3. Reset or remove conflicting keybindings
4. Roll back or change Python extension version
5. Update VS Code / Python extension
6. Open a terminal manually and run your code snippet there

try this steps.. it might help

[eleanorjboyd]

Thanks everyone for your comments! I want to make sure we are fixing any bugs in the product and it seems like the outstanding issue is with “Send to Native REPL” and with the python environments extension? If someone could clarify we can investigate further and get these bugs solved.