pygame学习之绘制圆

 import pygame
 from pygame.locals import *

 pygame.init()
 screen = pygame.display.set_mode((600, 500))
 pygame.display.set_caption("drawing a circle")
 while True:
     for event in pygame.event.get():
         if event.type in (QUIT, KEYDOWN):
             exit()
     screen.fill((0, 0, 200))
     color = 255, 255, 0
     position = 300, 250
     radius = 100                 # 圆的半径
     width = 10
     pygame.draw.circle(screen, color, position, radius, width)
     pygame.display.update()