<p>我有一个作业要用python和turtle画一个螺旋(从内到外),但是我想不出一个方法来做,除了我所做的,它需要这样:</p>
<p><a href="https://i.stack.imgur.com/UQCW8.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UQCW8.gif" alt="enter image description here"/></a></p>
<p>我试过那样做,但效果不好。在</p>
<pre><code>import turtle
turtle.shape ('turtle')
d = 20 #Distance
a = 1 #StartingAngle
x = 200 #Num of loops
for i in range (x):
turtle.left(a)
turtle.forward(d)
a = a + 5
</code></pre>