Python·Tkinter·学习记录——用Entry写个登录器界面（输入栏含提示语）

最近在学习Tkinter，写个简单的登录器界面作为学习记录。

import tkinter as tk
root = tk.Tk()
root.geometry('200x200')

Members=[
    {
     'account':'张三','password':'333'},
    {
     'account':'李四','password':'444'},
    {
     'account':'王二麻子','password':'mazi'}]

""" * * * * * * * * * * * * * * * * 
    *       编 写 功 能 函 数      *
    * * * * * * * * * * * * * * * *
"""
def validate_func_account():
    if entry_account.get():
        return True
    else:
        return False
def invalidate_func_account():
    entry_account.insert(0,"账号")
    return True
        
def validate_func_password():
    if entry_password.get():
        return True
    else:
        return False
def invalidate_func_password():
    entry_password.insert(0,"密码")
    return True
        
""" * * * * * * * * * * * * * * * 
    *        创 建 控 件        *
    * * * * * * * * * * * * * * *
"""
def Entry_Account(window):
    entry_account = tk.Entry(window,validate='focusout',validatecommand=validate_func_account,invalidcommand=invalidate_func_account)
    entry_account.insert(0,"账号")
    entry_account.pack()
    return entry_account
def Entry_Password(window):
    entry_password = tk.Entry(window,
                              validate='focusout',validatecommand=validate_func_password,invalidcommand=invalidate_func_password)
    entry_password.insert(0,"密码")
    entry_password.pack()
    return entry_password
def Button_Login(window):
    button_login = tk.Button(window,text='登录')
    button_login.place(anchor='center',relx=0.5,rely=0.5,width=100,height=60)
    return button_login
def Label_login_success(window):
    label_login_success = tk.Label(window,text='登录成功',bg='#F0FFF0')
    label_login_success.place(anchor='s',relx=0.5,rely=1,width=100,height=60)
    return label_login_success
def Label_login_failure_a(window):
    label_login_failure_a = tk.Label(window,text='账号错误',bg='#F0FFF0')
    label_login_failure_a.place(anchor='s',relx=0.5,rely=1,width=100,height=60)
    return label_login_failure_a
def Label_login_failure_p(window):
    label_login_failure_p = tk.Label(window,text='密码错误',bg='#F0FFF0')
    label_login_failure_p.place(anchor='s',relx=0.5,rely=1,width=100,height=60)
    return label_login_failure_p

""" * * * * * * * * * * * * * * * * 
    *       添 加 控 件           *
    * * * * * * * * * * * * * * * *
"""
entry_account = Entry_Account(root)
entry_password = Entry_Password(root)
button_login = Button_Login(root)

""" * * * * * * * * * * * * * * * *
    *       编 写 事 件           *
    * * * * * * * * * * * * * * * *
"""
def Account_Blank(event=True):
    entry_account.delete(0, "end")
    pass
def Password_Blank(event=True):
    entry_password.delete(0, "end")
    pass
def Login(event=True):
    for member in Members:
        if entry_account.get() == member['account']:
            account = 1
            if entry_password.get() == member['password']:
                password = 1
            else:
                password = 0
        else:
            pass
    if account == 1 and password==1:
        Label_login_success(root)
    elif account == 0:
        Label_login_failure_a(root)
    elif password == 0:
        Label_login_failure_p(root)
        
""" * * * * * * * * * * * * * * * * 
    *       绑 定 事 件           *
    * * * * * * * * * * * * * * * *
"""
entry_account.bind('',Account_Blank)
entry_password.bind('',Password_Blank)
button_login.bind('',Login)


# 进入消息循环，保持程序持续运行
root.mainloop()

运行下看看效果：

• 开始界面:
  
• 登陆错误:
  
• 登录成功:
  

输入栏的提示语的写法会导致，当输入账号和密码时，想去改已经输入的部分，会直接清除从头开始。
但是我想不到更好的方式让输入栏显示提示语，欢迎大佬提点建议。