Python3.13 All functions fail to send: IndentationError: unexpected indent

Discussed in #24222

^{Originally posted by ddxv October 2, 2024}
I recently fired up Python3.13rc2 but quickly found that any lines I send to the terminal do not work, specifically anything with additional line breaks or with indentation.

The new REPL, as I'm sure you know, autoindents for users. So it appears I'm getting a new indent for each line + the existing indent, causing a deeper and deeper indent even on a flat function. As you can see in the screenshot:

This inevitably leads to: IndentationError: unexpected indent

I'm opening a discussion because I don't see others mentioning this for Python 3.13, so I was not sure if this is actually a bug or something unique to my settings?

If others are encountering this, happy to turn this into a ticket.

I am experiencing the same.

Version: 1.94.2 (system setup)
Commit: 384ff7382de624fb94dbaf6da11977bba1ecd427
Date: 2024-10-09T16:08:44.566Z
Electron: 30.5.1
ElectronBuildId: 10262041
Chromium: 124.0.6367.243
Node.js: 20.16.0
V8: 12.4.254.20-electron.0
OS: Windows_NT x64 10.0.26100
python: 3.13.0

Same behaviour and error, only happens with python 3.13, 3.12 works fine.

Thanks for the bug report! We investigate issues in order based on priority and severity, which includes the impact it has on your ability to use the extension to do productive work, and the number of people affected. If other users come forward and leave a comment demonstrating they are seeing/reproducing the problem then we will raise this issue's priority. Thanks for understanding and the patience!

Please go ahead and upvote this meanwhile so that we can further acknowledge the severity.

Regarding severity, it greatly inhibited my ability to do work. Testing individual blocks of code is no longer a viable option for me. I cannot copy paste, I cannot shift+enter, I cannot right click and run in interactive window... I have to modify the python code, then to non-interactively test I run the entire program that calls the python. Dramatic decrease in productivity as a result of tedious testing and debugging.

For me and students of our classes the impact is also huge. We teach the first steps of Python programming by letting them run blocks of code using shift+enter, but with the new behavior this is no longer an option at all.

I just wanted to add that this also severely impacts how I use Python 3.13 in Visual Studio Code. For those looking for a workaround (other than downgrading Python to ≤ 3.12 or setting the env variable PYTHON_BASIC_REPL=1, which are both not good options), is to use the "Native REPL" (enable in the settings).

BTW, just to let Windows users know that this currently does not work in Windows Terminal either, see python/cpython#124119.

I updated VS Code to the most updated version (1.95.0) but still have the same error with Python 3.13 on Windows and Mac OS.

Clemens Brunner (@cbrnr)

Thanks Clemens Brunner (@cbrnr) for

(other than downgrading Python to ≤ 3.12 or setting the env variable PYTHON_BASIC_REPL=1, which are both not good options), is to use the "Native REPL" (enable in the settings).

Thanks everyone for the feedback here. Team is actively looking into resolving this, but please try out the "Native REPL" setting to send code and execute in Native REPL instead of terminal meanwhile.

Having the same indentation error issue

Karthik Nadig (@karthiknadig)

Hi Karthik Nadig (@karthiknadig) , May i know if this issue was resolved?

CannotBii

CannotBii yes. But note that there is a issue on python itself that isn't python/cpython#124096

I have this error and it's a really boring!

*it's really annoying

«ennuyeux» a deux traductions en anglais qui sont totalement différentes :)

I'm having the same indentation issue.

I don't know what happened, but this version now allows Python 3.13 to run in the terminal without showing the 'unexpected indent' error.

版本: 1.101.0 (system setup)
認可: dfaf44141ea9deb3b4096f7cd6d24e00c147a4b1
日期: 2025-06-11T15:00:50.123Z
Electron: 35.5.1
ElectronBuildId: 11727614
Chromium: 134.0.6998.205
Node.js: 22.15.1
V8: 13.4.114.21-electron.0
OS: Windows_NT x64 10.0.26100

I'm having issues with this error as well. This is how I develop code, It will greatly impact on my performance. I'm using an older python version beause of this

I don't know what happened, but this version now allows Python 3.13 to run in the terminal without showing the 'unexpected indent' error.

I think its combination of #24401 python/cpython#124119 and python/cpython#133457

Hi folks, I've resolved #25164 which would effectively bring you to the REPL that you are used to using, and you won't need to press extra enter in the terminal to run your command, or experience further indentation issues.

Please give a pre-release version of Python extension a try on VS Code insiders.

Thanks aton and let me know if something comes up.

Also give https://code.visualstudio.com/updates/v1_101#_language-server-based-terminal-suggest a try :)
We've brought the language server completions to REPL in terminal, which would make the REPL experience lot more positive and enjoyable.

Very pleasing! Thank you!

…

________________________________ From: Anthony Kim ***@***.***> Sent: Friday, June 27, 2025 5:23:56 PM To: microsoft/vscode-python ***@***.***> Cc: Tyler Widdison ***@***.***>; Comment ***@***.***> Subject: Re: [microsoft/vscode-python] Python3.13 All functions fail to send: IndentationError: unexpected indent (Issue #24256) [https://github.com/proxy/avatars.githubusercontent.com/u/62267334?s=20&v=4]anthonykim1 left a comment (microsoft/vscode-python#24256)<#24256 (comment)> Hi folks, I've resolved #25164<#25164> which would effectively bring you to the REPL that you are used to using. Please give a pre-release version of Python extension a try on VS Code insiders. Thanks aton and let me know if something comes up. Also give https://code.visualstudio.com/updates/v1_101#_language-server-based-terminal-suggest a try :) We've brought the language server completions to REPL in terminal, which would make the REPL experience lot more positive and enjoyable. — Reply to this email directly, view it on GitHub<#24256 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BMVEICK4JPFE5DGPIW7X3DT3FXHAZAVCNFSM6AAAAABPNP652KVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTAMJUGYZTEMZZGI>. You are receiving this because you commented.Message ID: ***@***.***>

It seems it was fixed but now is no longer working again...

I don't know if this is helpfull or viable but after installing oh-my-posh it is working again.

Anthony Kim (@anthonykim1)

Anthony Kim (@anthonykim1) does this mean it works on the release version?

Seems like the release version is now breaking as well again

HI folks, sorry for the regression. I've resolved this again here #25296 and this should've been out on the latest point release.

Can people update to latest release (2025.10.1) , or pre-release and see?

Make sure to restart extension and run command "Python Clear Cache and Reload"

I did as you said, hit ctrl+p and found 'Python Clear Cache and Reload'

I still run into issue

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Python3.13 All functions fail to send: IndentationError: unexpected indent #24256

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Python3.13 All functions fail to send: IndentationError: unexpected indent #24256

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Discussed in #24222

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AlexNaglich commented on Oct 14, 2024

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