Python多层List转单层

multilist2list.py

def switch_re(the_list):
    """
    多层list转单层
    :param the_list: 需要转换的List
    :return: 单层List
    """
    if isinstance(the_list, list):
        now = the_list[:]
        res = []
        while now:
            head = now.pop(0)
            if isinstance(head, list):
                now = head+now
            else:
                res.append(head)
        return res
    else:
        return the_list