import turtle
import time
import random
n = int(input("how many circles do you want? "))
radius = int(input("Radius?"))
turtle.forward(radius)
turtle.left(90)
for circle in range(num, 0, -1):90 (num..1)
turtle.begin_fill()
turtle.color(random.random(),random.random(), random.random())
turtle.circle(radius * circle / num)
turtle.end_fill()
turtle.left(90)
turtle.forward(radius / num)
turtle.right(90)
答案 0 :(得分:2)
for circle in range(num, 0, -1):90 (num..1)
这不是有效的Python语法。假设它的意思是评论,那就是:
for circle in range(num, 0, -1): # num..1
然而,如果你记得这个,你会发现自己是一个更好的艺术实践者:代码告诉你 如何完成事情,评论告诉你为什么他们是完成。
任何查看Python代码的人都应该已经意识到循环从num
开始倒计时(顺便说一下,这应该是n
,或者顶部的输入应该分配给num
)到1
,否则他们不应该在代码中寻找。
答案 1 :(得分:0)
对于范围内的圆(num,0,-1):90(num..1)
In For Condition“:”是必须指示循环的开始,
对于范围内的圆(num,0,-1):#(num..1)
你的变量num也没有被定义,假设你把它放错了变量n。
这会给你同心圆。您可以根据用户输入循环它。将整个事物包装成for循环以简化编码,然后转换为函数。
import turtle as tu
# initial radius
radius = 100
# distance between circles
distance = 30
# pen up
tu.up()
# move pen to point x, y
# keeps the center of the circle at canvas center
tu.goto(0, -radius)
# pen down
tu.down()
tu.circle(radius)
# increase the radius value by distance
radius += distance
# pen up
tu.up()
# move pen to point x, y
# keeps the center of the circle at canvas center
tu.goto(0, -radius)
# pen down
tu.down()
tu.circle(radius)
tu.done() #done