Python 如果用户名或密码错误，如何将输入字段的边框设置为红色？

如果用户名或密码错误，请将字段的边框更改为红色，而不是tkinter python中的弹出窗口

用户名代码

    self.username_entry = Entry(
        self.frame, bg="white", bd=2,
        font=self.USERNAME_ENTRY_FONT, relief=FLAT, highlightthickness=1, highlightbackground="black",
        selectbackground="yellow", highlightcolor='#4584F1')
    self.username_entry.place(
        relx=float(self.USERNAME_ENTRY_X) / self.VIRTUAL_WIDTH,
        rely=float(self.USERNAME_ENTRY_Y) / self.VIRTUAL_HEIGHT,
        relheight=float(60) / 768, relwidth=float(454)/1366)
    self.username_entry.bind('<FocusIn>', self.username_entry_handler)
    self.username_entry.bind('<FocusOut>', self.username_entry_handler)

    self.password_entry = Entry(
        self.frame, bg="white", bd=2,
        font=self.PASSWORD_ENTRY_FONT, relief=FLAT, highlightthickness=1, highlightbackground="black",
        selectbackground="yellow", show='*', highlightcolor='#4584F1')
    self.password_entry.place(
        relx=float(self.PASSWORD_ENTRY_X) / self.VIRTUAL_WIDTH,
        rely=float(self.PASSWORD_ENTRY_Y) / self.VIRTUAL_HEIGHT,
        relheight=float(60) / 768, relwidth=float(454)/1366)
    self.password_entry.bind('<FocusIn>', self.password_entry_handler)
    self.password_entry.bind('<FocusOut>', self.password_entry_handler)
    self.password_entry.bind("<Tab>", no_op)

self.username\u entry=entry(
self.frame，bg=“白色”，bd=2，
font=self.USERNAME\u ENTRY\u font，浮雕=FLAT，highlightthickness=1，highlightbackground=“black”，
选择background=“yellow”，highlightcolor='#4584F1'）
self.username\u entry.place(
relx=浮动（self.USERNAME\u ENTRY\u X）/self.VIRTUAL\u宽度，
依赖=浮动（self.USERNAME\u ENTRY\u Y）/self.VIRTUAL\u高度，
relheight=float（60）/768，relwidth=float（454）/1366）
self.username\u entry.bind（“”，self.username\u entry\u handler）
self.username\u entry.bind（“”，self.username\u entry\u handler）

Pwd代码

    self.username_entry = Entry(
        self.frame, bg="white", bd=2,
        font=self.USERNAME_ENTRY_FONT, relief=FLAT, highlightthickness=1, highlightbackground="black",
        selectbackground="yellow", highlightcolor='#4584F1')
    self.username_entry.place(
        relx=float(self.USERNAME_ENTRY_X) / self.VIRTUAL_WIDTH,
        rely=float(self.USERNAME_ENTRY_Y) / self.VIRTUAL_HEIGHT,
        relheight=float(60) / 768, relwidth=float(454)/1366)
    self.username_entry.bind('<FocusIn>', self.username_entry_handler)
    self.username_entry.bind('<FocusOut>', self.username_entry_handler)

    self.password_entry = Entry(
        self.frame, bg="white", bd=2,
        font=self.PASSWORD_ENTRY_FONT, relief=FLAT, highlightthickness=1, highlightbackground="black",
        selectbackground="yellow", show='*', highlightcolor='#4584F1')
    self.password_entry.place(
        relx=float(self.PASSWORD_ENTRY_X) / self.VIRTUAL_WIDTH,
        rely=float(self.PASSWORD_ENTRY_Y) / self.VIRTUAL_HEIGHT,
        relheight=float(60) / 768, relwidth=float(454)/1366)
    self.password_entry.bind('<FocusIn>', self.password_entry_handler)
    self.password_entry.bind('<FocusOut>', self.password_entry_handler)
    self.password_entry.bind("<Tab>", no_op)

self.password\u entry=entry(
self.frame，bg=“白色”，bd=2，
font=self.PASSWORD\u ENTRY\u font，relief=FLAT，highlightthickness=1，highlightbackground=“black”，
选择background=“yellow”，show='*'，highlightcolor='#4584F1'）
self.password\u entry.place(
relx=浮动（self.PASSWORD\u ENTRY\u X）/self.VIRTUAL\u宽度，
依赖=浮动（自我密码输入）/自我虚拟高度，
relheight=float（60）/768，relwidth=float（454）/1366）
self.password\u entry.bind（“”，self.password\u entry\u处理程序）
self.password\u entry.bind（“”，self.password\u entry\u处理程序）
self.password\u entry.bind（“，无操作）

如果登录失败，您可以将两个输入字段的选项

highlightcolor

和

highlightbackground

配置为红色。比如：

import tkinter as tk
root = tk.Tk()

def login():
    # login / passord checking
    right_login = False  

    if right_login:
        print('logged in')
    else:
        username_entry.configure(highlightbackground='red', highlightcolor='red')
        password_entry.configure(highlightbackground='red', highlightcolor='red')

username_entry = tk.Entry(root, bg="white", bd=2, relief='flat', 
                          highlightthickness=1, 
                          highlightbackground="black", 
                          selectbackground="yellow", 
                          highlightcolor='#4584F1')
password_entry = tk.Entry(root, bg="white", bd=2, relief='flat',
                          highlightthickness=1, highlightbackground="black",
                          selectbackground="yellow", show='*', 
                          highlightcolor='#4584F1')

username_entry.pack()
password_entry.pack()

tk.Button(root, text='Log In', command=login).pack()
root.mainloop()

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事实上，我应该要求一个，带有导入语句的。这里真正重要的是您使用的是什么类型的条目（tkinter或ttk）