tkinter windows appear at the center of the screen in python

You can center a Tkinter window by calculating the screen's center coordinates and setting the window to appear there using the geometry method. Here's an example:

main.py
import tkinter as tk

# Create the window
window = tk.Tk()

# Set the window's size
window.geometry("300x200")

# Calculate the center of the screen
screen_width = window.winfo_screenwidth()
screen_height = window.winfo_screenheight()
center_x = int(screen_width / 2 - 150) # Half the window's width
center_y = int(screen_height / 2 - 100) # Half the window's height

# Set the window to appear at the center of the screen
window.geometry(f"+{center_x}+{center_y}")

# Run the GUI loop
window.mainloop()
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In this example, we first create the window using tk.Tk(), then set its size to 300x200 using geometry. Next, we calculate the center coordinates of the screen using winfo_screenwidth and winfo_screenheight, and divide the values by 2 to get the midpoint of the screen. We then subtract half the window's height and width from the midpoint to get the top-left corner of the window. Finally, we use the geometry method again to set the window to appear at this location, using the +x+y syntax to specify the offset from the top-left corner of the screen.

Running this code will display a window that is centered on the screen.