save project

my_app.py

 import tkinter
+from tkinter import messagebox
 
-def login_to_reg():    # 登录界面转注册界面
-    pass
+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
+    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 n 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("错误","用户名已经存在！")
+    elif password1 != password2:
+        messagebox.showwarning("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","注册成功")
+    else:
+        messagebox.showwarning("错误","用户名或密码错误")
 
 class My_login():       # 登录窗口
     def __init__(self):