This shows how to create a screen in pygame.

HOWTOCREATEASCREEN.py

#!/usr/bin/env python

import random, os.path

#import basic pygame modules
import pygame
from pygame.locals import *
SCREENRECT     = Rect(0, 0, 640, 480)
GAME_ON = True


def main(winstyle = 0):
    # Initialize pygame
    pygame.init()
    # Set the display mode
    winstyle = 0  # |FULLSCREEN
    bestdepth = pygame.display.mode_ok(SCREENRECT.size, winstyle, 32)
    screen = pygame.display.set_mode(SCREENRECT.size, winstyle, bestdepth)
    while GAME_ON:

        #get input
        for event in pygame.event.get():
            if event.type == QUIT or \
                (event.type == KEYDOWN and event.key == K_ESCAPE):
                    return
        keystate = pygame.key.get_pressed()

#call the "main" function if running this script
if __name__ == '__main__': main()