Source

pygame / examples / aacircle.py

#!/usr/bin/env python

"""Proof of concept gfxdraw example"""

import pygame
import pygame.gfxdraw

def main():
    pygame.init()
    screen = pygame.display.set_mode((500,500))
    screen.fill((255, 0, 0))
    s = pygame.Surface(screen.get_size(), pygame.SRCALPHA, 32)
    pygame.gfxdraw.aacircle(s, 250, 250, 200, (0, 0, 0))
    screen.blit(s, (0, 0))
    pygame.display.flip()
    try:
        while 1:
            event = pygame.event.wait()
            if event.type == pygame.QUIT:
                break
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE or event.unicode == 'q':
                    break
            pygame.display.flip()
    finally:
        pygame.quit()

if __name__ == '__main__':
    main()