DI Container with FastDepends built by https://github.com/Lancetnik

container.py

from typing import TypeVar, ParamSpec, Callable
from fast_depends import inject
from fast_depends.dependencies.provider import Provider

T = TypeVar("T")
P = ParamSpec("P")


class Container(Provider):
    def execute(
        self,
        func: Callable[P, T],
        *args: P.args,
        **kwargs: P.kwargs,
    ) -> T:
        return inject(dependency_overrides_provider=self)(func)(*args, **kwargs)

example.py

from typing import Protocol, runtime_checkable, Annotated, Any
from fast_depends import Depends

from container import Container

@runtime_checkable
class SomeClass(Protocol):
    def __init__(self):
        ...

    def request(self) -> Any:
        ...

class RealClass:
    def __init__(self) -> None:
        self.url = "outer-url"

    def request(self) -> Any:
        return {"status": 200}


def func(client: Annotated[SomeClass, Depends(SomeClass)]) -> Any:
    return client.request()


container = Container()
with container.scope(SomeClass, RealClass):
    assert container.execute(func) == {"status": 200}