Python turtle库绘制中国结

import turtle as t
def goto(x,y):
    t.penup()
    t.goto(x,y)
    t.pendown()
    
def init():
    t.setup(800,800)
    t.pensize(10)
    t.pencolor("red")
    t.speed(14)
    
def jiexin():
    m,n=0,200
    for i in range(11):
        goto(m,n)
        t.seth(-45)
        t.fd(200)
        m-=20/pow(2,0.5)
        n-=20/pow(2,0.5)
        
    m,n=0,200
    for j in range(11):
        goto(m,n)
        t.seth(-135)
        t.fd(200)
        m+=20/pow(2,0.5)
        n-=20/pow(2,0.5)
        
def jiexiaoban():
    m=-20/pow(2,0.5)
    n=200-20/pow(2,0.5)
    for k in range(4):
        goto(m,n)
        t.seth(135)
        t.fd(20)
        t.circle(10,180)
        t.fd(20)
        m-=40/pow(2,0.5)
        n-=40/pow(2,0.5)
        
    m=20/pow(2,0.5)
    n=200-20/pow(2,0.5)
    for k in range(4):
        goto(m,n)
        t.seth(45)
        t.fd(20)
        t.circle(-10,180)
        t.fd(20)
        m+=40/pow(2,0.5)
        n-=40/pow(2,0.5)

    m=20/pow(2,0.5)
    n=200-200*pow(2,0.5)+20/pow(2,0.5)
    for k in range(4):
        goto(m,n)
        t.seth(-45)
        t.fd(20)
        t.circle(10,180)
        t.fd(20)
        m+=40/pow(2,0.5)
        n+=40/pow(2,0.5)
        
    m=-20/pow(2,0.5)
    n=200-200*pow(2,0.5)+20/pow(2,0.5)
    for k in range(4):
        goto(m,n)
        t.seth(-135)
        t.fd(20)
        t.circle(-10,180)
        t.fd(20)
        m-=40/pow(2,0.5)
        n+=40/pow(2,0.5)
        
def waiyuan():
    goto(90*pow(2,0.5),200-110*pow(2,0.5))
    t.seth(-45)
    t.circle(20,270)
    
    goto(-90*pow(2,0.5),200-110*pow(2,0.5))
    t.seth(-135)
    t.circle(-20,270)
    
    goto(80*pow(2,0.5),200-120*pow(2,0.5))
    t.seth(-45)
    t.circle(40,270)
    
    goto(-80*pow(2,0.5),200-120*pow(2,0.5))
    t.seth(-135)
    t.circle(-40,270)

def shengzi():
    goto(0,200)
    t.pensize(20)
    t.seth(90)
    t.fd(60)
    goto(0,320)
    t.pensize(12)
    t.seth(180)
    t.circle(30,360)
    
    goto(0,200-200*pow(2,0.5))
    t.pensize(40)
    t.seth(-90)
    t.fd(20)
    t.pensize(2)
    s=-20
    for i in range(11):
        goto(s,200-200*pow(2,0.5))
        t.seth(-90)
        t.fd(200)
        s+=4
        
def hanzi():
    goto(-150,325)
    t.write("幸福中国结",font=("Arial",40,"normal"))
    
def main():
    init()
    jiexin()
    jiexiaoban()
    waiyuan()
    shengzi()
    hanzi()
    t.hideturtle()
    t.done()
main()