save project

my_client.py

@@ -88,11 +88,11 @@ def register():     # 注册验证
         reg_to_login()
 
 def login():        # 登录验证
+    global app
     name, password = app_login.get_input()
     pwd = users.get(name)
     if pwd == password:
         messagebox.showinfo("成功", "登录成功")
-        global app
         app_login.root.destroy()
         app = Note()
         app.show()