gistfile1.txt

registry = {
    'db': 'my database',
    'redis': 'my redis',
    'settings': 'my settings'
}


def inject(func):
    def wrapper(*args, **kwargs):
        injected = {k: registry[dep] for k, dep in func.__annotations__.items()}
        
        bound = partial(func, **injected)

        return bound(*args, **kwargs)

    return wrapper


@inject
def my_func(value, fancy_db: 'db', useless_redis: 'redis'):
    print(fancy_db, useless_redis, value)


my_func(5)