擅长:python、mysql、java
<p>我想你想要这样的东西。你知道吗</p>
<pre><code># make a list of balls
balls = []
for i in range(4):
ball=Circle(Point(FieldWidth//2,FieldHeight//2),BallSize)
ball.setFill("red")
ball.draw(Field)
balls.append(ball) # put ball into balls list
# do stuff to a single ball
ball[2].setFill("red")
# do stuff to all balls
for ball in balls:
ball.setFill("red")
</code></pre>