auto save

my_app.py

 import tkinter
+from tkinter import messagebox
+import json
+with open("user.txt","r",encoding="utf-8") as f:
+    info = f.read()
+    users = json.loads(info)
 
 def login_to_reg():    # 登录界面转注册界面
-    pass
+    app_login.root.destroy()
+    global app_reg
+    app_reg = My_register()
+    app_reg.show()
 
 def reg_to_login():   # 注册界面转登录界面
-    pass
+    app_reg.root.destroy()
+    global app_login
+    app_login = My_login() 
+    app_login.show()
 
 def register():     # 注册验证
-    pass
-
+    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.showwarning("警告","用户名已存在！")
+    elif password1 !=password2:
+        messagebox.showwarning("警告","两次密码不一致！")
+    else:
+        users[name] = password1
+        content = json.dumps(users)
+        with open("user.txt","w",encoding="utf-8") as fa:
+            fa.write(content)
+        messagebox.showinfo("成功","注册成功")    
 def login():    # 登录验证
     pass    
 

user.txt

-{"admin": "123456"}
\ No newline at end of file
+{"admin": "123456", "\u963f\u745f\u4e1c": "123"}
\ No newline at end of file