auto save

my_app.py

 import tkinter
+import json
+from tkinter import messagebox
+
+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，请输入完整的信息')
+    elif name in users:
+        messagebox.showwarning('错误，用户已存在')
+    elif password1 != password2:
+        messagebox.showwarning('错误，两次输入密码不一致')
+    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','注册成功')
+        reg_to_login()
 
 def login():    # 登录验证
-    pass    
+    name, password = app_login.get_input()
+    pwd = users.get(name)
+    if pwd == password:
+        messagebox.showinfo("成功", "登录成功")
+    else:
+        messagebox.showwarning("错误", "用户名或密码错误!")    
 
 class My_login():       # 登录窗口
     def __init__(self):

user.txt

-{"admin": "123456"}
\ No newline at end of file
+{"admin": "123456", "we": "123", "wewe": "122"}
\ No newline at end of file