auto save

demo.py

+import json
+
+dict = {'admin':'123456'}
+info = json.dumps(dict)
+
+with open('user.txt','w',encoding='utf-8')as file:
+    file.write(info)

my_app.py

 import tkinter
+from tkinter import messagebox
+import json
+
+with open('user.txt','r',encoding='utf-8')as file:
+    info = file.read()
+    print(type(info))
+    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','用户信息不完整')
+    elif name in users:
+        messagebox.showwarning('警告','账号信息已存在')
+    elif password1 != password2:
+        messagebox.showerror('错误','两次密码不一致')
+    else:
+        users[name] = password1
+        content = json.dumps(users)
+        with open('user.txt','w',encoding='utf-8')as file:
+            file.write(content)
+        messagebox.showinfo('成功','注册信息成功')
+        reg_to_login()
 def login():    # 登录验证
     pass