TPI: Disable PyREPL for REPL in terminal

[anthonykim1]

Refs: #25164

• macOS @aiday-mar
• linux @eleanorjboyd
• windows @nguyenchristy

Complexity: 3

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Thank you in advance for testing.

Background Information

PyREPL is a new REPL from cpython, that became the "default" REPL starting with Python 3.13.
This has introduced considerable number of issues for VS Code , and non-VS Code users, in terms of how people run their Python code, interact with REPL in terminal.

Relevant issues filed on VS Code Python repository: #24256 #25043

We are disabling PyREPL for now, hoping to bring back the smoother code execution flow from before.

When I say smoother code execution flow, I'm referring to users pressing shift+enter and that being sufficient to run user's code, rather than requiring an extra, or multiple presses of enter in the REPL in order to run their code. We also want to prevent people from running in undesired and unexpected indentation error at all cost.

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Setup & Testing:

1. Install pre-release version of Python extension
2. Please have Python version that is below 3.12 AND also Python version that is equal to or above 3.13
3. Have Python file of your choice with Python code (feel free to have different elements such as a dictionary, class, method, simple print statement, loops)
4. Shift+enter to execute different segment of your Python code.
5. Toggle setting python.REPL.sendToNativeREPL on/off and try running code in both REPL in terminal, Native REPL.
6. Observe you don't see any weird characters or weird indentation error in the terminal or the Native REPL.

[aiday-mar]

Hi @anthonykim1 thanks for this TPI. When you talk about a Python file with code, should this be an ipynb file? I opened a py file and pressing shift+enter inside just adds new lines. Or do you mean to have py file and run it from the terminal with python file.py and press shift+enter?

Also if I understood correctly we should follow the steps above with python < 3.13 and python > 3.13 and the setting turned on and off?

[eleanorjboyd]

@aiday-mar (anthony's is out so I can answer this)

yes it would need to be a python file in this case and then yes the four combinations with python < 3.13 and python > 3.13 and the setting turned on and off.

[anthonykim1]

Thank you all for testing!

Yes @aiday-mar You should test on .py file rather than .ipynb file.
And also yes for testing with setting on/off with Python < 3.13 and Python >= 3.13 like Eleanor has mentioned

The indentation experience should be consistent regardless of Python versions.

[aiday-mar]

Great thanks! I will test now

[aiday-mar]

verified with python 3.9.6 and python 3.13.5 with the setting turned on and off on three different python files