Python精灵模块的Mouse指令

from sprites import Screen,Sprite,Mouse

screen = Screen()
screen.setup(480,360)

bug = Sprite()
# 实例化鼠标左键(1,2,3分别对应左中右键)
leftkey = Mouse(1)    
while True:
    if leftkey.downup():
        print("鼠标左键按下并释放")
        bug.goto(leftkey.pos)
    screen.update()