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()
+    uses=json.loads(info)
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
     global app_reg
@@ -7,11 +12,29 @@ def login_to_reg():    # 登录界面转注册界面
     app_reg.show()
 
 def reg_to_login():   # 注册界面转登录界面
-    pass
+    app_reg.root.destroy()
+    global app_login
+    app_login=My_login()
+    app_login.show()
     
-def register():     # 注册验证
-    pass
 
+def register():     # 注册验证
+    name,password1,password2=app_reg.get_input()
+    if name=="" or password1=="" or password2=="":
+        messagebox.showwarning("警告","请填写完整的资料")
+    elif name in uses:
+        messagebox.showwarning("错误","用户已经存在")
+    elif password2 != password1:
+        messagebox.showwarning("错误","两次填写不正确")
+    else: 
+        uses[name]=password1
+        con=json.dump(uses)
+        with open("user.txt","w",encoding="utf-8")as filo:
+            filo.write(con)
+        messagebox.showinfo("成功，注册成功")
+        app_reg.root.destroy()
+        app_login=My_login()
+        app_login.show()     
 def login():    # 登录验证
     pass