Re: [pygame] groups

[Lenard Lindstrom <len-l@xxxxxxxxx>]

Gonzalo Castro wrote:
> HI! I'm practising with groups and I have problems. ;)
> I have 2 clases, ball and killer... they are more or less the same,
> and 3 objects: a 2 of class ball and the other of class killer. I
> grouped both of 2 objects balls into a group called my_balls. I define
> it like this:
>
> global my_balls= pygame.sprite.Group(ball, second)
>
> and at  some point of the game I do:
>
> print(myballs.has())
>
> And this prints None. What Am I missing?
>
> Thank you a lot. :)
>   
group.has() is a membership test that takes at least one sprite as an 
argument. It tests if a one or more sprites are in a group. It it not 
for testing if any sprites are in a group. This is not documented, yet, 
but to check if a group is empty or not get its boolean value. An empty 
group evaluates to False.

print bool(my_balls)

or

if my_balls:
   print "has sprites"
else:
   print "empty"


--
Lenard Lindstrom
<len-l@xxxxxxxxx>