save project

my_app.py

 import tkinter
+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
     app_login.root.destroy()
@@ -6,10 +11,22 @@ def login_to_reg():    # 登录界面转注册界面
     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 passwoprd1=="" or password2==""
+        messagebox.showwarning("jinggao","qingtianxiewanzhengdezhucezhiliao")
+    elif name in users:
+        messagebox.showwarning("error","gaiyonghumingyijingcunzai")
+    elif password1 != password2:
+        messagebox.showwarning("error","liangcimimabuyizhi")
+    else:
+        users[name] = password1            
+    
 
 def login():    # 登录验证
     pass