As of the latest version of Pylance, types are no longer included when autocompleting inherited methods.

[brett1479]

Environment data

• Pylance version: v2024.10.1
• OS and version: Windows 10 Pro, 22H2
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.12.2

Code Snippet

class A:
    def f(self, a: int, b: str) -> None:
        pass
    
class B(A):
    def f(self, a, b):
        return super().f(a, b)

Repro Steps

1. When I ask VS Code to autocomplete/generate the code for f in class B (i.e., I type def f and then let it autocomplete) no types are included. (They were included on Pylance 2024.9.2.)

Expected behavior

The following used to be generated (specifically what follows after def f):

class B(A):
    def f(self, a: int, b: str) -> None:
        return super().f(a, b)

Actual behavior

Now this is generated (specifically what follows after def f):

class B(A):
    def f(self, a, b):
        return super().f(a, b)

Logs

Currently omitted due to all the personal path information I don't want to include. Can be included if needed.

[StellaHuang95]

It’s likely that you're in the treatment group of an experiment we're running, which disables type annotations in completions when type checking mode is set to off. You should be able to see the types if you switch to basic or strict mode by adding the following to your settings.json.

{
    "python.analysis.typeCheckingMode": "basic",
}

Could you share your thoughts on this change? We're gathering user feedback to help us decide on the next steps. Thanks!

[brett1479]

Thank you for the quick reply! Enabling basic did work. In my current workflow I use mypy for all type checking, and like the option of not being forced to use a second type checker.

[heejaechang]

for now, you can explicitly set "python.analysis.completionOverrideExperiment": false to turn off the experiement

[HosseinMarvi]

for now, you can explicitly set "python.analysis.completionOverrideExperiment": false to turn off the experiement

This config no longer works with v2025.2.1. Does anyone have any alternatives or suggestions?