Redefining type annotation for a member of a class defined in 3rd party library

[dmi-dmi-dmi]

Hi guys.

I have quite large legacy codebase which uses a 3rd-party framework with type annotations.

Most part of the codebase looks like this

from framework import  BaseClass

class CustomHandler(BaseClass):
    def process(self, data):
        params = self.app.registry.get_params()
        self.app.added_in_runtime_property.handle_complex_case(parms, data)    

The problem is that app has type annotation in the framework code and added_in_runtime_property is a property added in runtime through hooks exposed by the framework.

Is there a way to redefine type annotation for app so that it also includes added_in_runtime_property without actually subclassing BaseClass and inheriting from it instead in the codebase?

[Gobot1234]

from framework import BaseClass

class CustomHandler(BaseClass):
    app: MyCustomApp

    def process(self, data):
        params = self.app.registry.get_params()
        self.app.added_in_runtime_property.handle_complex_case(parms, data)

Should work, app wouldn't do anything to BaseClass.app (which would still be where python looks for the definition)

[dmi-dmi-dmi]

@Gobot1234 huh, I didn't think you can do it this way. Thanks a lot!

I am just curious if there is a way to do this for entire codebase without modifying handler files. I mean it would be nice to do so but I am more than fine with your approach as it should help improve quality of the code.