save project

my_app.py

 import tkinter
 from tkinter import messagebox
-
+import json
 with open("user.txt","r",encoding="utf-8") as f:
-        into = f.read()
-        users = json.loads(info)
+    info = f.read()
+    users = json.loads(info)
 
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
@@ -20,8 +20,13 @@ def reg_to_login():   # 注册界面转登录界面
 def register():     # 注册验证
     name,password1,password2 = app_reg.get_input()
     if name=='' or password1=='' or password2=='':
-        messaebox.showwarning("警告","请填写完整的注册资料")
-    
+        messagebox.showwarning("警告","请填写完整的注册资料")
+    elif name in users:
+        messagebox.showwarning("错误","用户名已经存在!")
+    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    

py

+ 
\ No newline at end of file