我的天

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import turtle, math
def arc(t, r, angle):
    n = 20 # int(2*math.pi*r/4)+3 公式画图太细致太慢，直接赋值加速
    step_length = int(2*math.pi*r)*angle/360/n
    step_angle = angle/n
    t.lt(step_angle/2) # 据说折腾一下角度能消除像素误差？
    polygon(t, step_length, n, step_angle)
    t.rt(step_angle/2)
def polygon(t, length, n, angle):
    for i in range(n):
        t.fd(length)
        t.lt(angle)
def start(t): # 起点要先偏移一些，每次方向保持一致
    t.pu()
    t.home()
    t.goto(160,-110)
def square(t, size): # 第一个正方形
    for i in range(4):
        t.lt(90)
        t.fd(size)                
    t.rt(90)
def boxes(t, n, size): # n-1个正方形
    a = b = 1
    base = size
    for i in range(n-1):
        for i in range(6):
            t.lt(90)
            t.fd(size)
        t.rt(90)
        fibo = a+b # 计算斐波那契数列
        a = b
        b = fibo
        size = base*fibo
def spiral(t, n, size): # 第一个正方形里没有弧线，所以弧线也是n-1
    a = b = 1
    base = size
    for i in range(n-1):
        arc(t, size, 90)        
        fibo = a+b # 在算一次斐波那契数列
        a = b
        b = fibo
        size = base*fibo
bob = turtle.Turtle()
bob.pensize(2) # 笔迹粗点好看些
n = 8
size = 20
start(bob)
square(bob, size)
boxes(bob, n, size)
start(bob)
spiral(bob, n, size)
turtle.mainloop()

import turtle, math def arc(t, r, angle): n = 20 # int(2*math.pi*r/4)+3 公式画图太细致太慢，直接赋值加速 step_length = int(2*math.pi*r)*angle/360/n step_angle = angle/n t.lt(step_angle/2) # 据说折腾一下角度能消除像素误差？ polygon(t, step_length, n, step_angle) t.rt(step_angle/2) def polygon(t, length, n, angle): for i in range(n): t.fd(length) t.lt(angle) def start(t): # 起点要先偏移一些，每次方向保持一致 t.pu() t.home() t.goto(160,-110) def square(t, size): # 第一个正方形 for i in range(4): t.lt(90) t.fd(size) t.rt(90) def boxes(t, n, size): # n-1个正方形 a = b = 1 base = size for i in range(n-1): for i in range(6): t.lt(90) t.fd(size) t.rt(90) fibo = a+b # 计算斐波那契数列 a = b b = fibo size = base*fibo def spiral(t, n, size): # 第一个正方形里没有弧线，所以弧线也是n-1 a = b = 1 base = size for i in range(n-1): arc(t, size, 90) fibo = a+b # 在算一次斐波那契数列 a = b b = fibo size = base*fibo bob = turtle.Turtle() bob.pensize(2) # 笔迹粗点好看些 n = 8 size = 20 start(bob) square(bob, size) boxes(bob, n, size) start(bob) spiral(bob, n, size) turtle.mainloop()