python读取文件数据实现简单的注册操作

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2019-11-21 14:32
# @ player :zhaohq
# @Email : 909095763@qq.com
# @File : zhuc.py
name = input('name:')
with open('zhuc.txt', 'a') as fo:
    with open('zhuc.txt', 'r') as fo:
        data = fo.readlines()  # 读取信息到data
        count = data.__len__()  # 计算data数据量
i = 0
while i < count:
    with open('zhuc.txt', 'r') as fo1:
        data = fo1.readlines()  # 读取信息到data
        count = data.__len__()  # 计算data数据量
        str1 = data[i]
        str2 = str1[:str1.rfind('\t')]  # 读取用户名
        if name == str2:
            print('用户名已注册，请输入其他用户名')
            name = input('name:')
            i = 0
            continue
        else:
            i = i+1
            continue
else:
    password = input('password')
    with open('zhuc.txt', 'a') as fo:
        fo.writelines([name, '\t', password, '\n'])
        print('注册成功')