When using the MessageBox of class toplevel, a problem pops up in the window.

Encountered main window and... In a small project toplevel Windows all use class Class time ,toplevel The window pops up messagebox Will automatically jump to the main window , meanwhile toplevel The window will automatically be behind the main window .

Looking up the information on the Internet , The main methods are in messagebox increase parent Parameters , The following code .

from tkinter.messagebox import *
root = Tk()
texto = Toplevel(root)
showinfo("title", "message",parent=texto)

But the project uses class,toplevel There is no clear parent, stay csdn Is used by netizens parent=self._root, But after the test, it is not correct .

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from tkinter import *
from tkinter.ttk import *
from tkinter.messagebox import *
import os

currentpath=os.path.dirname(__file__)
class AcurateQueryWindow(Toplevel):

    showwarning('warning','input four parameters!')

Later stackoverflow Go up for help , The answer is parent=self. The test passed , Pop up messagebox be located toplevel Before window .

showwarning('warning','input four parameters!',parent=self)