Python tkinter 窗体居中和tkinter messagebox使用

# -*- coding: UTF-8 -*-
import tkinter as tk
from tkinter import *
from tkinter import messagebox
if __name__ == "__main__":
    window = tk.Tk()
    window.title('信息查询')
    width = 680
    height = 540
    # 设置窗体固定最大值和最小值一样，设置窗体大小不可改变
    window.maxsize(width,height)
    window.minsize(width,height)
    # 获取屏幕宽、
    screen_width=window.winfo_screenwidth()
    screen_height=window.winfo_screenheight()
    # 居中获取宽、高
    windowX= (screen_width-width)/2
    windowY=(screen_height-height)/2
    window.geometry("%dx%d+%d+%d"%(width,height,windowX,windowY))
    label = tk.Label(window,text="查询姓名",width=40)
    # 声明输入框
    e = Entry(window)
    # 单人查询
    def showONE():
        global gname 
        gname = e.get()
        print("查询姓名:",gname)
        messagebox.showinfo(title="查询提示1", message="查询名字是的%s!"%gname) 

    #初始化 按钮名称：以及绑定事件
    buttonIns = tk.Button(window, text='单人查询', relief=tk.RAISED, command=showONE,bg="pink")
    buttonDel = tk.Button(window, text='清空', relief=tk.RAISED, command="",bg="pink")
    # x y：按钮横坐标、纵坐标 width、height：按钮宽、高
    label.place(x=90,y=20,width=80, height=30)
    e.place(x=160,y=20,width=80, height=30)
    buttonIns.place(x=260, y=20, width=80, height=30)
    buttonDel.place(x=460, y=20, width=80, height=30)
    window.mainloop()