human
Solve the following python programming problem given the following code:
@gen.coroutine
def _QueryViewpointsForArchive(client, user_id, viewpoint_ids, get_followers=False, get_activities=False, get_episodes=False, get_comments=False, get_attributes=False):
assistant
#Here is the Python code you requested.

    """Queries viewpoint metadata, as well as associated followers and episodes.
    """
    @gen.coroutine
    def _QueryFollowers():
        'Produces    list    of    (followers,    last_key)    tuples,    one    for    each    viewpoint    in    the    request.'
        tasks = []
        for vp_id in viewpoint_ids:
            if get_followers:
                tasks.append(Viewpoint.QueryFollowers(client, vp_id))
            else:
                tasks.append(util.GenConstant(None))
        follower_results = (yield tasks)
        raise gen.Return(follower_results)
    @gen.coroutine
    def _QueryActivities():
        'Produces    list    of    (activities,    last_key)    tuples,    one    for    each    viewpoint    in    the    request.'
        tasks = []
        for vp_id in viewpoint_ids:
            if get_activities:
                tasks.append(gen.Task(Viewpoint.QueryActivities, client, vp_id))
            else:
                tasks.append(util.GenConstant(None))
        activity_results = (yield tasks)
        raise gen.Return(activity_results)
    @gen.coroutine
    def _QueryEpisodes():
        'Produces    list    of    (episodes,    last_key)    tuples,    one    for    each    viewpoint    in    the    request.'
        tasks = []
        for vp_id in viewpoint_ids:
            if get_episodes:
                tasks.append(gen.Task(Viewpoint.QueryEpisodes, client, vp_id))
            else:
                tasks.append(util.GenConstant(None))
        episode_results = (yield tasks)
        raise gen.Return(episode_results)
    @gen.coroutine
    def _QueryComments():
        'Produces    list    of    (comments,    last_key)    tuples,    one    for    each    viewpoint    in    the    request.'
        tasks = []
        for vp_id in viewpoint_ids:
            if get_comments:
                tasks.append(gen.Task(Viewpoint.QueryComments, client, vp_id))
            else:
                tasks.append(util.GenConstant(None))
        comment_results = (yield tasks)
        raise gen.Return(comment_results)
    viewpoint_keys = [db_client.DBKey(vp_id, None) for vp_id in...