auto save

my_app.py

 import tkinter
+import json
+from tkinter import messagebox
+with open('user.txt','r',encoding='utf-8') as f:
+    info = f.read()
+    info1 = json.loads(info)                 #json模块需要导入
+name = ''
+password1 = ''
+password2 = ''
 
 def login_to_reg():    # 登录界面转注册界面
-    pass
+    app_login.root.destroy()
+    global app_reg
+    app_reg = My_register()
+    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
-
+    name,password1,password2= app_reg.get_input() 
+    if name == '' or password1 == '' or password2 == '':
+        messagebox.showwarning('警告','请补全所有的注册信息！')
+    elif name in info1 :
+        messagebox.showwarning('警告','用户名已经被注册！')
+    elif password1 != password2:
+        messagebox.showwarning('警告','两次输入的密码不同，请重新输入')
+    else:
+        info1[name] = password1
+        info2 = json.dumps(info1)
+        with open('user.txt','w',encoding='utf-8') as f:
+            f.write(info2)
+        messagebox.showinfo('提示','恭喜，注册成功！')
 def login():    # 登录验证
     pass    
 
@@ -19,6 +44,7 @@ class My_login():       # 登录窗口
         self.root.geometry('400x300+500+300')
         self.root.resizable(width=False, height=False)  # True可以拉伸，False不能拉伸
 
+
     def show(self):         # 登录界面的所有控件
         # Label文本标签，界面提示信息
         l = tkinter.Label(self.root, text='您好！请登录', bg='green', 

user.txt

-{"admin": "123456"}
\ No newline at end of file
+{"123": "123456", "python": "123456", "123212": "123"}
\ No newline at end of file