Python画五角星层叠图案和分形树——turtle包的使用

效果展示

代码展示

五角星代码

import turtle

def drawstar(size):
    for i in range(5):
        turtle.forward(size)
        turtle.right(144)

def main():
#    t=turtle.Pen()
    turtle.penup()
    turtle.right(90)
    turtle.bk(200)
    turtle.left(90)
    turtle.pendown()
    turtle.pensize(2)
    turtle.pencolor('red')
    size=50
    while size<=100:
        drawstar(size)
        size+=10

    turtle.exitonclick()

if __name__=='__main__':
    main()

分形树代码

import turtle
def draw_branch(branch_length):
    if branch_length>5:
        turtle.forward(branch_length)
        turtle.right(20)
        print('右转 20')
        draw_branch(branch_length-15)

        turtle.left(40)
        print('左转 40')
        draw_branch(branch_length-15)

        turtle.right(20)
        print('右转 20')
        turtle.backward(branch_length)
        print('向后',branch_length)


def main():
    turtle.left(90)
    turtle.penup()
    turtle.backward(150)
    turtle.pendown()
    turtle.color('brown')
    draw_branch(40)

    turtle.exitonclick()


if __name__=='__main__':
    main()