Python通过简单的文件读写,来实现注册登录
# -*- coding:utf-8 -*- '''''' username = input('请输入您的姓名:') password = input('请输入密码:') with open('get_info.txt','w+',encoding='utf-8') as file: file.write('{}\n{}'.format(username,password))
#file.write('%s\n%s'%(username,password)) 用着行代码就可以不用使用format函数,效果是一样的 print('注册成功!\n开始登录') i = 0 lis = [] while i<3: usn = input('请输入您的姓名:') pwd = input('请输入密码:') with open('get_info.txt','r+',encoding='utf-8') as f: for line in f: lis.append(line) if usn == lis[0].strip() and pwd == lis[1].strip():#strip函数,用于消除空格和换行符 print('登录成功!') break else: print('账号或者密码错误') i+=1
优化修改后
将代码进行优化重写后 文件可以一直存储用户名密码,不再只对第一次输入的用户名密码进行存储,可以对随后的登录,输入上一次的用户名密码,仍然支持登录
# -*- coding:utf-8 -*- username = input('username:') password = input('password:') with open('user1.text','a+',encoding='utf-8') as file: file.write('{}\n{}'.format(username,password))#注意format前是加‘.’而不是逗号 file.write('\n') i = 0 lis = [] with open('user1.text','r+',encoding='utf-8') as filer: for line in filer: lis.append(line) while i<3: print('开始登录,请输入用户名,密码:') user = input('用户名:') pawd = input('密码:') for f in range(int(len(lis))): if user == lis[f].strip() and pawd == lis[f+1].strip(): print('登录成功!') exit()#退出程序 else: print('用户名或密码错误!') i += 1