python-demo实例

1.turtle库与蟒蛇案例

import turtle

def drawSnake(rad,angle,len,neckrad):

    for i in range(len):

        turtle.circle(rad,angle)

        turtle.circle(-rad,angle)

    turtle.circle(rad,angle/2)

    turtle.fd(rad)

    turtle.circle(neckrad+1,180)

    turtle.fd(rad*2/3)

def main():

    turtle.setup(1300,800,0,0)

    pythonsize = 30

    turtle.pensize(pythonsize)

    turtle.pencolor("blue")

    turtle.seth(-40)

    drawSnake(40,80,5,pythonsize/2)

main()