@component
class A:  # A instance will be created and stored in context
    pass


@component
class B:
    a: A  # In this case an instance of A will be chosen from context and injected in B


@component
class C:
    b: B

    def __init__(self, a: A):  # And here an instance of A will also be chosen from context
        self.b = B()           # and injected in B, but created manually
        self.b.a = a

print(get_component_from_context(C))  # This will print <__main__.C object at 0x0...>