手写split功能

def split_new(stringstr, charstr):
    """
    :param stringstr: 要分割的串
    :param charstr: 按该串分割
    :return: 返回分割后的list
    """
    res = []
    lenchar = len(charstr)
    while 1:
        index = stringstr.find(charstr) #如果没有找到目标字符串，返回-1
        if index == -1:
            res.append(stringstr)
            return res
        else:
            res.append(stringstr[:index])  #将目标字符串前的字符串存下来
            stringstr = stringstr[index+lenchar:] 新字符串截取自目标字符串以后的

if __name__=="__main__":
    print(split_new("ABCDEFGAA@@ABCDEFGA@@ABCDEFG", "ZZZ"))