auto save

my_app.py

 import tkinter
+from tkinter import messagebox
+import json
 
+with open("user.txt","r",encoding="utf-8") as file:
+    info = file.read()
+    user = json.loads(info)
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
     global app_reg
@@ -9,11 +14,24 @@ def login_to_reg():    # 登录界面转注册界面
 def reg_to_login():   # 注册界面转登录界面
     app_reg.root.destroy()
     global app_login
-    app_login = My_register()
+    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 user:
+        messagebox.showwarning("错误","用户已存在")
+    elif password1 !=password2:
+        messagebox.showwarning("错误","密码不一致")
+    else:
+        user[name] = password1
+        content = json.dumps(user)
+        with open("user.txt","w",encoding="utf-8") as file:
+            file.write(content)
+        messagebox.showinfo("成功","注册成功")
+        login_show()
 
 def login():    # 登录验证
     pass    

user.txt

-{"admin": "123456"}
\ No newline at end of file
+{"admin": "123456", "python": "123456"}
\ No newline at end of file