function

def get_regions_belong_by_state_id(state_id):
    cursor = conn.cursor()
    sql = "SELECT name FROM regions WHERE belong_to_state = {}".format(state_id)
    cursor.execute(sql)
    result = cursor.fetchall()
    print(result)
    return_value = " , ".join(x[0] for x in result)
    cursor.close()
    return return_value