This for an XBMC plugin I am building which displays movies you are missing from your movie collection. From what I understand, XBMC stores IMDB ids, while TMDB's collections api only returns TMDB ids for the movies in the collection. This means I have to make a call for every movie in the xbmc database in order to get their TMDB id. Below is my code:

def get_tmdb_configuration():
    request = urllib2.Request("http://api.themoviedb.org/3/configuration?api_key=%s" % API_KEY, headers={"Accept" : "application/json"})
    response = urllib2.urlopen(request).read()
    data = json.loads(response)
    return data['images']['base_url']

def get_movie_by_imdb_id(imdb_id):
    request = urllib2.Request("http://api.themoviedb.org/3/movie/%s?api_key=%s" % (imdb_id,API_KEY), headers={"Accept" : "application/json"})
    response = urllib2.urlopen(request).read()
    data = json.loads(response)
    collection = str(data["belongs_to_collection"]['id']) if data["belongs_to_collection"]  is not None else None
    movie = Movie(title=data['title'], id=str(data['id']),collection_id=collection,poster_path=base_image_url + data["poster_path"])
    return movie

def get_collection(collection_id):
    request = urllib2.Request("http://api.themoviedb.org/3/collection/%s?api_key=%s" % (collection_id,API_KEY), headers={"Accept" : "application/json"})
    response = urllib2.urlopen(request).read()
    data = json.loads(response)
    collection = Collection(name=data["name"],id=str(data["id"]),poster_path=base_image_url + data["poster_path"])
    for part in data["parts"]:
        movie = Movie(title=part['title'], id=str(part['id']),own=False,collection_id=collection.id,poster_path= base_image_url + part["poster_path"])
        collection.movies.append(movie)
    return collection

def organize_movies_by_collections(imdb_ids):
    collections ={}
    for imdb_id in imdb_ids:
        current_movie = get_movie_by_imdb_id(imdb_id)

        if current_movie.collection_id is not None:  
            if current_movie.collection_id in collections:
                current_collection = collection[current_movie.collection_id]
            else:
                current_collection = get_collection(current_movie.collection_id)
                collections[current_movie.collection_id] = current_collection

            movies_in_collection_owned = 0    
            for movie in current_collection.movies:
                if movie.id == current_movie.id:
                    movie.own = True
                    movies_in_collection_owned += 1

            if len(current_collection.movies) == movies_in_collection_owned:
                current_collection.own_all = True
    return collections

Thanks in advance for your help.