from typing import Generic, TypeVar

_T = TypeVar("_T")

class Bar(Generic[_T]):
    def __init__(self) -> None:
        self.value: str = 'start'
    def __get__(self, instance: _T, owner: type[_T] | None = None) -> str:
        return self.value
    def __set__(self, instance: _T, value: str) -> None:
        self.value = value

class Foo(object):
    bar: Bar = Bar()

import compiled

print("hello")

f = compiled.Foo()
print(f.bar)

f.bar = 'test'
print(f.bar)