import turtle

设置初始半径和间隔距离

radius = 20 gap = 20

创建画布和画笔

canvas = turtle.Screen() pen = turtle.Turtle()

循环绘制同心圆

while radius <= 200: pen.penup() pen.goto(0, -radius) pen.pendown() pen.circle(radius) radius += gap

关闭画布

canvas.exitonclick()