human
Solve the following python programming problem given the following code:
@ classmethod 
def QueryPosts(cls, client, episode_id, user_id, callback, limit = None, excl_start_key = None, base_results = None) : 
    "Queries posts (up to 'limit' total) for the specified
    'episode_id', viewable by 'user_id'. The query is for posts starting
    with (but excluding) 'excl_start_key'. The photo metadata for each
    post relation are in turn queried and the post and photo metadata
    are combined into a single dict. The callback is invoked with the
    array of combined post/photo metadata, and the last queried post
    sort-key.

    The 'base_results' argument allows this method to be re-entrant.
    'limit' can be satisfied completely if a user is querying an
    episode they own with nothing archived or deleted. However, in cases
    where an episode hasn't been fully shared, or has many photos archived
    or deleted by the requesting user, QueryPosts needs to be re-invoked
    possibly many times to query 'limit' posts or reach the end of the
    episode.
    " 
    def _OnQueryMetadata(posts, results) : 
        'Constructs the photo metadata to return. The "check_label" argument
      is used to determine whether to use the old permissions model or the
      new one. If "check_label" is true, then only return a photo if a label
      is present. Otherwise, the photo is part of an episode created by
      the new sharing functionality, and the user automatically has access
      to all photos in that episode.
      ' 
        ph_dicts = (base_results or []) 
        for (post, (photo, user_post)) in zip (posts, results) : 
            ph_dict = photo._asdict () 
            labels = post.labels.combine () 
            if (user_post is not None) : 
                labels = labels.union (user_post.labels.combine ()) 
if (len (labels) > 0) : 
                ph_dict ['labels'] = list (labels) 
ph_dicts.append (ph_dict) 
last_key = (posts [(- 1)].photo_id if (len (posts) > 0) else None) 
        if ((last_key is not None) and (len (ph_dicts) < limit)) : 
           ...

    
    

    Fix the buggy line: Post.RangeQuery (episode_id, hash_key = episode_id, range_desc = None, limit = limit, col_names = None, callback = _OnQueryPosts, excl_start_key = excl_start_key)
assistant
#Here is Python program to determine whether to use the old permissions model or the
.

Post.RangeQuery (client, hash_key = episode_id, range_desc = None, limit = limit, col_names = None, callback = _OnQueryPosts, excl_start_key = excl_start_key)