This code will make a full screen window with pygame that you can close with Esc key. At the end you will see the width and height of the screen.
# phisyc.py import pygame import sys pygame.init() WSIZE = (0, 0) screen = pygame.display.set_mode(WSIZE) W, H = screen.get_size() print(W, H) clock = pygame.time.Clock() loop = 1 while loop: for event in pygame.event.get(): if event.type == pygame.QUIT: loop = 0 if event.type == pygame.KEYDOWN: if event.key == pygame.K_ESCAPE: loop = 0 pygame.display.update() clock.tick(60) pygame.quit() sys.exit()