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() 
+    user=json.loads(info)
 def login_to_reg():    # 登录界面转注册界面
-    pass
-
-def reg_to_login():   # 注册界面转登录界面
-    pass
+    app_login.root.destroy()
 
+    app_reg=My_register()
+    app_reg.show()
+def reg_to_login(): 
+    app_reg=My_register() 
+    global app_login # 注册界面转登录界面
+    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","请填完信息")
+    elif name in users:
+        essagebox.showwarning("错误","用户名已存在")
+    elif password1 != password2:
+        essagebox.showwarning("错误","两次密码不一致")
+    else:
+        users[name]=password1
+        content=json.dumps(users)
+        with open("user.txt","w",encoding="uif-8") as flie:
+            flie.write(content) 
 def login():    # 登录验证
     pass