save project

my_app.py

 import tkinter
 import tkinter
+from tkinter import messagebox
+import json
+
+with open("user.txt","r",encoding="utf-8") as f2:
+    info = f2.read()
+    zd = json.loads(info)
 
 
 def login_to_reg():    # 登录界面转注册界面
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
     app_login.root.destroy()
@@ -7,11 +13,21 @@ def login_to_reg():    # 登录界面转注册界面
     app_reg.show()
     app_reg.show()
 
 
 def reg_to_login():   # 注册界面转登录界面
 def reg_to_login():   # 注册界面转登录界面
-    app_reg.root
+    app_reg.root.destroy()
+    global app_login
+    app_login = My_login()
+    app_login.show()
 
 
 def register():     # 注册验证
 def register():     # 注册验证
-    pass
-
+    name, mima1, mima2 =app_reg.get_input()
+    if name=="" or mima1=="" or mima2=="":
+        messagebox.showwarning("警告","请填写完整信息")
+    elif name in zd:
+        messagebox.showerror("错误","此用户名已被注册")
+    elif mima1 != mima2:
+        messagebox.showerror("错误","两次密码不一致")
+    else:
+        zd[name] = mima1
 def login():    # 登录验证
 def login():    # 登录验证
     pass    
     pass