Fetching picks in parallel

gistfile1.txt

def fetch_picks(games, users):
    """ Fetches picks for a given list of games and users
    """
    key_names = []
    for user in users:
        key_names.extend([Pick.make_key_name(user, game) for game in games])
    
    # Fetch in parallel, 1k at a time
    picks = []
    for slice in miscutils.split_list(key_names, 1000):
        picks.extend(Pick.get_by_key_name(slice))
    return picks