蟒蛇绘制

import turtle
 
def drawSnake(rad,angle,len,neckrad):
    for i in range(len):
        turtle.circle(rad,angle) #turtle.circle()函数功能:rad——半径，angle——小乌龟沿着圆形爬行的弧度值。
        turtle.circle(-rad,angle)
 
    turtle.circle(rad,angle/2)
    turtle.fd(rad)#也可称为turtle.forward()函数：表示小乌龟向前直线爬行移动，参数表示爬行的距离。
 
    turtle.circle(neckrad+1,180)
    turtle.fd(ra*2/3)
 
def main():
    turtle.setup(1300,800,0,0)
    pythonsize = 30 #运行轨迹的宽度，此处设为30个像素
    turtle.pensize(pythonsize)
    turtle.pencolor("blue") #运行轨迹的颜色,Python采用RGB格式的颜色
    turtle.seth(-40)#小乌龟爬行角度，向-40度爬行
    drawSnake(40,80,5,pythonsize/2)
main()