TypedDict (and pydantic) usage across modules

[dineshbvadhia]

I want to use TypedDict objects created in one module across other modules. The simple example below works with Python (3.9.12) but throws up mypy (0.961) errors which I've not been able to resolve. I also get similar errors with Pydantic with the mypy plugin enabled. Please explain why this is and how to solve it. Thank-you

wind.py

from typing import TypedDict
import willow

class Hall(TypedDict):
    s: str
    l: list[int]

class Toad:
    def mole(self, data: Hall) -> None:
        a: str
        b: list[int]
        a, b = willow.badger(data)
        print('s:', a, 'l:', b)

Toad().mole(Hall(s='xzy', l=[1, 3, 5]))

willow.py

from typing import Union

def badger(d: dict[str, Union[str, list[int]]]) -> tuple[str, list[int]]:
    g: str = d['s']
    h: list[int] = d['l']
    return g, h

> python wind.py
s: xzy l: [1, 3, 5]

> mypy wind.py --no-incremental
willow.py:4: error: Incompatible types in assignment (expression has type "Union[str, List[int]]", variable has type "str")
willow.py:5: error: Incompatible types in assignment (expression has type "Union[str, List[int]]", variable has type "List[int]")

wind.py:12: error: Argument 1 to "badger" has incompatible type "Hall"; expected "Dict[str, Union[str, List[int]]]"```

[dineshbvadhia]

Ah, I solved the problem with the judicious use of 'self' :)