python - 二者択一の状況で一連の値を提供する方法は?

Question

関数を書くためのよりクリーンな方法を探していlookup_and_urlます。私のロジックを宣言して実装するには、もっと簡潔な方法が必要だと思います。コード自体の中で、外部関数と内部関数を正確に記述するために最善を尽くしました。

def render(opener='corp'):
    """render will render a carousel of videos, with the opener being
    corp or uk and the follower being the other"""

    def lookup_and_url():
        """"lookup_and_url() returns the DOM id and url for the
        opening video (the opener) and the video to follow (the follower).

        It returns a dictionary that allows a loop to make a DOM
        lookup of the id of the HTML element and then replace its
        `src attribute with the provided URL
        """

        src = dict(
            corp='http://www.youtube.com/embed/0lrqEGlu0Fo',
            uk='http://www.youtube.com/embed/30MfCTLhdZ4'
        )

        if opener == 'corp':
            return dict(
                opener = dict(lookup='opener', src=src['corp']),
                follower = dict(lookup='follower', src=src['uk'])
            )
        else:
            return dict(
                opener = dict(lookup='opener', src=src['uk']),
                follower = dict(lookup='follower', src=src['corp'])
            )

    lookup_and_src = lookup_and_url()

    for replace in lookup_and_src:
        root.findmeld(lookup_and_src['lookup']).attributes(src=lookup_and_src['src'])