NewMountain

    www.youtube.com###guide-content #endpoint[title="Shorts"]:upward(ytd-guide-entry-renderer)
    www.youtube.com###items #endpoint[title="Shorts"]:upward(ytd-mini-guide-entry-renderer)
    www.youtube.com##ytd-browse ytd-grid-video-renderer:has(span.ytd-thumbnail-overlay-time-status-renderer[aria-label="Shorts"])
    www.youtube.com##ytd-browse ytd-rich-item-renderer:has(span.ytd-thumbnail-overlay-time-status-renderer[aria-label="Shorts"])
    www.youtube.com##ytd-search ytd-video-renderer:has(span.ytd-thumbnail-overlay-time-status-renderer[aria-label="Shorts"])
    www.youtube.com##ytd-watch-next-secondary-results-renderer ytd-compact-video-renderer:has(span.ytd-thumbnail-overlay-time-status-renderer[aria-label="Shorts"])

    if __name__ == "__main__":
        a = os.getenv("foo")
        b = get_from_somewhere()
        c = "some_hardcoded_variable"
        my_app(a, b, c)

    di = Di()

    @di.register('A')
    class A:

        def __init__(self, di: Di):
            pass

        def action(self):
            print("Hi from A")

    @di.register('B')
    class B:

        def __init__(self, di: Di):
            self._di = di
            self._a = None

        def run(self):
            self.get_a().action()

        def get_a(self):
            if self._a is None:
            self._a = self._di.get('A')
            return self._a

    @di.override('A') # replace class A definition with a new one
    class C:

        def __init__(self, di: Di):
            pass

        def action(self):
            print("Hi from C")

    di.get('B').run() # prints "Hi from C"
    di.remove('B') # removes the B dependency from the registry

    class A:

        def __init__(self):
            pass

        def action(self):
            print("Hi from A")

    class B:

        # A is default for some reason
        def __init__(self, a=A()):
            self._a = a

        def run(self):
            self._a.action()

    class C:

        def __init__(self):
            pass

        def action(self):
            print("Hi from C")


    if __name__ == "__main__":
        if os.getenv('ENV') == "PROD":
            a = A()
            b = B()
        # test/non-prod/whatever version
        else:
            a = A()
            b = B(C())