save project

my_app.py

 import tkinter
 from tkinter import messagebox
+import json
+
+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()
@@ -19,6 +24,12 @@ def register():     # 注册验证
         messagebox.showerror('错误','请填写正确的用户资料')
     elif password1 != password2:
         messagebox.showerror('错误','两次密码不相同')        
+    elif name in users:
+        messagebox.showerror('错误','用户名已被填写')
+    else:
+        users[name]=password1
+        content=json.dumps(users)
+            
 
 def login():    # 登录验证
     pass    

user.txt

-{"admin": "123456"}
\ No newline at end of file
+{"a": "123456"}
\ No newline at end of file