def METHOD_NAME(self, table_name, movie_file_path):
    """
    Gets movies from a JSON file and adds them to a table in the keyspace.
    :param table_name: The name of the table.
    :param movie_file_path: The path and file name of a JSON file that contains movie data.
    """
    with open(movie_file_path, 'r') as movie_file:
        movies = json.loads(movie_file.read())
    stmt = self.session.prepare(
        f"INSERT INTO {table_name} (year, title, release_date, plot) VALUES (?, ?, ?, ?);")
    for movie in movies[:20]:
        self.session.execute(stmt, parameters=[
            movie['year'], movie['title'],
            date.fromisoformat(movie['info']['release_date'].partition('T')[0]),
            movie['info']['plot']])