python - tkinter showerror creating blank tk window

Question

I have a program that needs to display graphical error messages to users. It is a tkinter GUI, so I am using tkinter.messagebox.showerror

When I call showerror, it shows the error, but also creates a blank "tk" window, the kind created when an instance of the Tk class is called, like root = Tk().

from tkinter.messagebox import showerror
showerror(title = "Error", message = "Something bad happened")

Produces

How can I make this blank window not appear?

Answer 1

from Tkinter import *
from tkMessageBox import showerror
Tk().withdraw()
showerror(title = "Error", message = "Something bad happened")

在显示错误消息之前调用Tk().withdraw()将隐藏根窗口。

注意：from tkinter import *对于 Python 3.x

Answer 2

正如这个答案中所解释的，在我们创建更多小部件/对话框之前，Tkinter 需要一个根窗口。如果没有根窗口，tkinter 创建一个。因此，要使空白窗口消失，首先我们需要自己创建一个根窗口，将其隐藏并在对话操作完成后将其销毁。下面的示例代码

from tkinter import Tk
from tkinter.messagebox import showerror

root = Tk()
root.withdraw()
showerror(title = "Error", message = "Something bad happened")
root.destroy()

注意：这适用于您只需要显示一个对话框并且不存在其他窗口的情况。