auto save

my_app.py

 import tkinter
 from tkinter import messagebox
+import json
 
-with open("user.txt","r",encoding="utf-8")as f:
+with open("user.txt", "r", encoding="utf-8") as f:
     info = f.read()
     users = json.loads(info)
 
@@ -11,38 +12,31 @@ def login_to_reg():    # 登录界面转注册界面
     app_reg = My_register()
     app_reg.show()
 
-
-
 def reg_to_login():   # 注册界面转登录界面
     app_reg.root.destroy()
     global app_login
     app_login = My_login()
     app_login.show()
 
-
 def register():     # 注册验证
-    name,password1,password2=app.get_input()
-    if name==""or password1==""or password2=="":
-        messagebox.showwarrning("警告","请填写完整的注册资料")
+    name,password1,password2 = app_reg.get_input()
+    if name =="" or password1=="" or password2=="":
+        messagebox.showwarning("警告", "请填写完整的注册资料")
     elif name in users:
-        messagebox.showwarrning("错误","用户已存在")
+        messagebox.showwarning("错误", "用户名已经存在!")
     elif password1 != password2:
-        messagebox.showwarrning("错误","两次密码不一致")
+        messagebox.showwarning("错误", "两次密码不一致!")
     else:
-         users[name]=password1  
-         content=json.dumps(users) 
-         with open("user.txt","r",encoding="utf-8")as f:
+        users[name] = password1
+        content = json.dumps(users)
+        with open("user.txt", "w", encoding="utf-8") as file:  
             file.write(content)
-        messagebox.showinfo()
-        reg_to_login()
+        # 注册成功，跳往登陆界面
+        messagebox.showinfo("成功", "注册成功")
+        login_show()
 
 def login():    # 登录验证
-    name.password=app_login.get_input()
-    pwd=users.get(name)
-    if pwd==password:
-        messagebox.showinfo("成功","登录成功")
-    elif:
-        messagebox.showinfo("错误","用户和密码错误")
+    pass    
 
 class My_login():       # 登录窗口
     def __init__(self):
@@ -75,11 +69,10 @@ class My_login():       # 登录窗口
         button1 = tkinter.Button(self.root, text='登录', bg="lightblue",
                   fg="black", width=15, command=login)
         button1.place(x=60, y=220)
-        button1 = tkinter.Button(self.root, text='注册', bg="lightgreen",
+        button2 = tkinter.Button(self.root, text='注册', bg="lightgreen",
                   fg="black", width=15, command=login_to_reg)
-        button1.place(x=230, y=220)
-        # 进入消息循环，监听事件
-        self.root.mainloop()
+        button2.place(x=230, y=220)
+        self.root.mainloop()    # 进入消息循环，监听事件
 
     def get_input(self):      # 获取输入的用户名、密码
         self.name = self.e1.get()
@@ -123,9 +116,9 @@ class My_register():        # 注册窗口
         button1 = tkinter.Button(self.root, text='提交', bg="lightblue",
                   width=15,command=register)
         button1.place(x=230, y=250)
-        button1 = tkinter.Button(self.root, text='取消', bg="lightgreen",
+        button2 = tkinter.Button(self.root, text='取消', bg="lightgreen",
                   width=15, command=reg_to_login)
-        button1.place(x=80, y=250)
+        button2.place(x=80, y=250)
         # 进入消息循环
         self.root.mainloop()