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python英文名译为蟒蛇，下面我们来绘制这条“蟒蛇”
import turtle
def drawSnake(rad,angle,len,neckrad):
for i in range(len):
turtle.circle(rad,angle)#按圆形爬行
turtle.circle(-rad,angle)
turtle.circle(rad,angle/2)
turtle.fd(rad)#乌龟向前直线爬行
turtle.circle(neckrad+1,180)
turtle.fd(rad*2/3)
def main():
turtle.setup(1300,800,0,0) #启动窗口的宽度和高度，左上角在坐标轴的位置
pythonsize=30
turtle.pensize(pythonsize) #小乌龟运行轨迹的宽度
turtle.pencolor("blue") #小乌龟运行轨迹的颜色“#3B9909”
turtle.seth(-40) #小乌龟运行的方向
drawSnake(40,80,5,pythonsize/2)#启动绘制蟒蛇的功能
main()结果如下：
