On Sun, 11 Jan 2009 14:06:22 -0800, killsto wrote:
> I have a class called ball. The members are things like position, size,
> active. So each ball is an object.
>
> How do I make the object without specifically saying ball1 = ball()?
> Because I don't know how many balls I want; each time it is different.
>
> The balls are to be thrown in from the outside of the screen. I think
> you get that is enough information.
>
> This doesn't directly pertain to balls, I have wanted to do something
> like this for many different things but didn't know how.
>
> I would think something like:
>
> def newball():
> x = last_named_ball + 1
> ball_x = ball(size, etc) # this initializes a new ball return ball_x
>
> But then that would just name a ball ball_x, not ball_1 or ball_2.
This is the TOTALLY wrong approach.
Instead of having named balls, have a list of balls.
balls = [] # no balls yet
balls.append(Ball()) # one ball comes in from off-screen
balls.append(Ball()) # and a second
del balls[0] # the first ball got stuck in a tree
balls = [] # all the balls were swept up in a hurricane and lost
balls = [Ball(), Ball(), Ball(), Ball()] # four balls come in
balls.append(Ball()) # and a fifth
for b in balls:
print b.colour # print the colour of each ball
and so forth.
--
Steven
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