auto save

my_app.py

 import tkinter
+from tkinter import messagebox
+import json
+
+with open("user.txt", "r", encoding="utf-8") as f1:
+    info = f1.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, mima, mima2 = app_reg.get_input()
+    if name=="" or mima=="" or mima2=="":
+        messagebox.showwarning("错误", "注册信息不完整！")
+    elif name in users:
+        messagebox.showwarning("错误", "用户名已存在！")
+    elif mima!=mima2:
+        messagebox.showwarning("错误", "两次输入的密码不一致！")
+    else:
+        users[name] = mima
+        s2 = json.dumps(users)
+        with open("user.txt", "w", encoding="utf-8") as f2:
+            f2.write(s2)
+        messagebox.showinfo("提示", "注册成功！")
+        reg_to_login()   #回到登录界面
 
 def login():    # 登录验证
-    pass    
+    name, mima = app_login.get_input()    
+    mima6 = users.get(name)
+    if mima==mima6:
+        messagebox.showinfo("提示", "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", "a": "1", "QEW": "1", "abc": "1"}
\ No newline at end of file