022测试对文档进行读取与写入

import time
LoginTime = time.asctime( time.localtime(time.time()) )
print ("time %s" % LoginTime)
count = 0
data = ("1注册新会员","2.会员登录")
print (data[0],data[1])
choice = input("请选择1或2（按其它键将退出）：")
 #if choice == "q":
  #  print("再见！")
if choice.isdigit():
    choice = int(choice)
with open("yesterday01","a+" ,encoding="utf-8") as f,open("yesterday01bak","a+" ,encoding="utf-8") as f_bak:
    if choice == 1:
        username =input("请输入用户名：")
        pwd = input("请输入密码：")
        print ("注册成功!")
        f.write("%s%s
"% (username,pwd))
        exit()
    elif choice ==2:
        for count in range(1,4):
            user_name = input("请输入用户名：")
            user_passwd = input("请输入密码：")
            with open("yesterday01","r+" ) as f,open("yesterday01bak","a+" ,encoding="utf-8") as f_bak:
                for line in f:
                    count2 = 3-count
                    if user_name and user_passwd in line.strip():
                        f_bak.write("%s,%s登录成功!
"%(LoginTime,user_name))
                        print("登录成功！")
                        exit()
                    elif user_name in line.strip() and user_passwd not in line.strip():
                        f_bak.write("%s,%s密码不对，第%s次登录失败!
"%(LoginTime,user_name,count))
                        if count2 > 0:
                            print("用户名或密码不对，你还有%s次登录机会!"% count2)
                    elif user_name not in line:
                        f_bak.write("%s,%s用户不存在，第%s次登录失败!
"%(LoginTime,user_name,count))
                        if count2 > 0:
                            print("%s用户不存在，你还有%s次登录机会!"% (user_name,count2))
                   # else:
                  #      f_bak.write("%s,%s第%s次登录失败!
"%(LoginTime,user_name,count))
                   #     print("用户名或密码不对，你还有%s次登录机会!"% count2)
        else:
            print("你已超过了登录次数！byebye!")

    else:
        print("再见！")