Quick fix to auto fill annotations from parent class

[corbane]

Please search existing feature requests to avoid creating duplicates.

Surprisingly, I did not find any questions on this topic

Describe the feature you'd like.

When a function is overloaded inside a subclass, the parameters have an Any type

Use case

it would be useful to have this functionality. In my case, I am developing a Blender plugin and I am using fake-bpy-module for types.
All the additions of features in the Blender software (Event, Ui, Command, GPU draw, ...) are done by overloading the base classes.
this makes the use of pylance of little use as all types are Any.
It is possible to rewrite the signature, but it's a shame and some functions have complex types, like dict which include tuples including union lists, etc.

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Thanks for what you do

[erictraut]

Parameters with no annotation are always assumed to have an Any type. This is standard behavior for Python type checkers. I don't think we'd want to deviate from standard Python behaviors in this regard.

Pylance attempts to help by copying the signature for you when you define a method override in a subclass. For example, if you were to type def fn within a new subclass of A, Pylance will offer to auto-complete, copying the full signature including type annotations.

After accepting the auto-complete:

[erictraut]

For method overrides that are already defined, perhaps it would make sense to offer a code action that adds any missing type annotations from the parent class.

[corbane]

Hello @erictraut, thank you for the answer

Pylance will offer to auto-complete

Yes I use it, but in case of previous scripts or external, it must be rewritten.

I really like Typescript, without the propagation of types it would be difficult to understand and verify old scripts (or parts of code written by someone else.).
JavaScript doesn't even have type annotation defined in its specification, and that doesn't bother the TypeScript team.
I'm surprised Pylance wants to be like other tools.

perhaps it would make sense to offer a code action

Yes I think it could be a flexible solution.
The only constraint is that with this we have to rewrite (apply the action code) on the external script parts to have type checking.

[judej]

Moving this issue to discussion as an enhancement request for comments and upvotes.