import json


def open_json(file_name):
    """
    Helper method to open and return json
    file.
    
    Parameters:
    --------------
    file_name: string representation of path to json file
    
    Returns:
    --------------
    tmp_playlist_json: json object
    """
    with open(file_name, 'r') as f:
        tmp_playlist_json = json.load(f)
    return tmp_playlist_json