I have a tkinter window I'd like to place in the middle of the screen, and am using Python 3 code like this:

import tkinter as tk

window = tk.Tk()
window_width = 500
window_height = 400
screen_width = window.winfo_screenwidth()
screen_height = window.winfo_screenheight()
horiz_centre = int((screen_width - window_width) / 2)
vert_centre = int((screen_height - window_height) / 2)
window.geometry(f"{window_width}x{window_height} {horiz_centre} {vert_centre}")

window.mainloop()

My window appears on the screen towards the top left, rather than centered as I'd like and expect from this code. My variables have the values I expect.

Running the same code multiple times does not guarantee the window will appear in the same location each time.

What's going on here?

Thank you.

CodePudding user response：

Your code works perfectly fine for me. It shows up in the middle of the screen every time I run the script - So that's the good news.

As far as why it's not working for you, I wonder if it could be the issue @jasonharper had stated in the comments. Otherwise I have had other issues that are similar with dual monitors and resolution settings that are worth a quick check.

Give this a try:

1.) Right-click your desktop and select "Display settings"

2.) Ensure your scale and layout are set to the recommended resolutions.

3.) Disconnect any additional monitors you may have connected.