auto save

my_app.py

 import tkinter
 from tkinter import messagebox
+import json
 
-with open("user.txt","r",encoding="utf-8")as f:
-    info=f.read()
-    print(info)
-    users=json.loads(info)
+with open("user.txt", "r", encoding="utf-8") as f:
+    info = f.read()
+    users = json.loads(info)
 
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
     global app_reg
-    app_reg=My_register()
+    app_reg = My_register()
     app_reg.show()
 
-
 def reg_to_login():   # 注册界面转登录界面
     app_reg.root.destroy()
-    app_login=My_login()
+    global app_login
+    app_login = My_login()
     app_login.show()
 
-def register(): 
-    name,password1,password2=app_reg.get_input()
-    if name ==""or password1==""or password2=="":
-        messagebox.showwarnbing("警告","大逼登,填完整!不长眼吗,智障")
+def register():     # 注册验证
+    name,password1,password2 = app_reg.get_input()
+    if name =="" or password2 == "" or password1=="":
+        messagebox.showwarning("警告", "请填写完整的注册资料")
     elif name in users:
-        messagebox.showwarnbing("错误","妈的,玩我呢!用户名已将存在")
-    elif password1 !=password2:
-        messagebox.showwarnbing("错误","啥子嘛，两次密码不一样")
+        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
-        content=json.dumps(users)
-        with open("user","w",encoding="utf-8") as file:
+        users[name] = password1
+        content = json.dumps(users)
+        with open("user.txt", "w", encoding="utf-8") as file:    # "w"每次写入都覆盖原来的内容
             file.write(content)
-        messagebox.showinfo("成功","智力正常,注册成功")
-
-def login():
-    name,password=app_login.get_input()
-    pwd=users.get(name)
-    if pwd==password:
-        messagebox.showwarning("成功","登录成功")
+        # 注册成功，跳往登陆界面
+        messagebox.showinfo("成功", "注册成功")
+        reg_to_login()
+
+def login():        # 登录验证
+    name, password = app_login.get_input()
+    pwd = users.get(name)
+    if pwd == password:
+        messagebox.showinfo("成功", "登录成功")
     else:
-        messagebox.showwarning("错误","大逼登,用户名错误")    # 登录验证
-        
+        messagebox.showwarning("错误", "用户名或密码错误!")
 
 class My_login():       # 登录窗口
     def __init__(self):
@@ -73,11 +74,10 @@ class My_login():       # 登录窗口
         button1 = tkinter.Button(self.root, text='登录', bg="lightblue",
                   fg="black", width=15, command=login)
         button1.place(x=60, y=220)
-        button1 = tkinter.Button(self.root, text='注册', bg="lightgreen",
+        button2 = tkinter.Button(self.root, text='注册', bg="lightgreen",
                   fg="black", width=15, command=login_to_reg)
-        button1.place(x=230, y=220)
-        # 进入消息循环，监听事件
-        self.root.mainloop()
+        button2.place(x=230, y=220)
+        self.root.mainloop()    # 进入消息循环，监听事件
 
     def get_input(self):      # 获取输入的用户名、密码
         self.name = self.e1.get()
@@ -121,9 +121,9 @@ class My_register():        # 注册窗口
         button1 = tkinter.Button(self.root, text='提交', bg="lightblue",
                   width=15,command=register)
         button1.place(x=230, y=250)
-        button1 = tkinter.Button(self.root, text='取消', bg="lightgreen",
+        button2 = tkinter.Button(self.root, text='取消', bg="lightgreen",
                   width=15, command=reg_to_login)
-        button1.place(x=80, y=250)
+        button2.place(x=80, y=250)
         # 进入消息循环
         self.root.mainloop()