def str2list(src_str):
    """convert the str to shape list
    Args:
        src_str: for example '1,2,3,4'
    Returns:
        ret: list, for example [1,2,3,4]
    """
    ret = []
    s_list = src_str.split(',')
    ret = [int(i) for i in s_list]
    return ret