有以下文件record.txt,将此文件三人对话每个人的内容单独保存一个文件，并每个文件中不包含对话人名

def text():
    with open('record', encoding='utf-8') as rf:
        while True:
            num = rf.readline()
            if num == '':
                break
            for i in num:
                if i == ':':
                    if num[0 : num.index(i)] == '陈皓':
                        with open('l1', mode='a+', encoding='utf-8') as wf:
                            wf.write(num[num.index(i)+1:])
                    elif num[0 : num.index(i)] == '苗子瑾':
                        with open('l2', mode='a+', encoding='utf-8') as wf:
                            wf.write(num[num.index(i)+1:])
                    elif num[0 : num.index(i)] == '周愉':
                        with open('l3', mode='a+', encoding='utf-8') as wf:
                            wf.write(num[num.index(i)+1:])

                    else:
                        pass

text()