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()
@@ -7,14 +12,21 @@ def login_to_reg():    # 登录界面转注册界面
     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_register()
+    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", "请填写完整的注册资料")
+    elif name in users:
+        messagebox.showwarning("错误", "用户名已存在！")
+    elif password1 != password2
+        messagebox.showwarning("错误", "两次密码不一致！")
+    else:
+        users[name] = password1
 
 def login():    # 登录验证
     pass