python - 如何使用 while 循环使 python 中的 turtle 对象再次出现和消失？

Question

我试图让一个对象从屏幕顶部开始，一直到底部并离开屏幕，然后重复。我的老师希望我们使用 while 循环，那么我该怎么做呢？

Answer 1

如果您假设 t 是一只 turtle ，help(t) 会为您提供:

 ...
 ...
 |  hideturtle(self)
 |      Makes the turtle invisible.
 |
 |      Aliases: hideturtle | ht
 |
 |      No argument.
 |
 |      It's a good idea to do this while you're in the
 |      middle of a complicated drawing, because hiding
 |      the turtle speeds up the drawing observably.
 |
 |      Example (for a Turtle instance named turtle):
 |      >>> turtle.hideturtle()
 |
 |  ht = hideturtle(self)
 |      Makes the turtle invisible.
 |
 |      Aliases: hideturtle | ht
 |
 |      No argument.
 |
 |      It's a good idea to do this while you're in the
 |      middle of a complicated drawing, because hiding
 |      the turtle speeds up the drawing observably.
 |
 |      Example (for a Turtle instance named turtle):
 |      >>> turtle.hideturtle()
 ...
 ...

类似地，还有一个 showturtle() 方法。

如果你算一下:

import turtle
import time

t = turtle.Turtle()
win = turtle.Screen()

for i in range(100):
    t.fd(100)
    t.hideturtle()
    time.sleep(1)
    t.showturtle()