save project

my_app.py

 import tkinter
+from tkinter import messagebox
+
+with open("user.txt","r",encoding="utf-8") as f :
+    info = f.read()
+    
 
 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