保存下来，方便以后使用
# 获取事件，比如按键等
for event in pygame.event.get():
# 判断是否是点击了退出按钮
if event.type == QUIT:
print("exit")
exit()
# 判断是否是按下了键
elif event.type == KEYDOWN:
# 检测按键是否是a或者left
if event.key == K_a or event.key == K_LEFT:
print(left)
# 检测按键是否是d或者right
elif event.key == K_d or event.key == K_RIGHT:
print(right)
# 检测按键是否是w或者up
elif event.key == K_w or event.key == K_UP:
print("up")
# 检测按键是否是s或者down
elif event.key == K_s or event.key == K_DOWN:
print("down")
# 检测按键是否是空格键
elif event.key == K_SPACE:
print(space)
