list.pop([i]) and list.remove(x) w/ for loops

[David White]

I was getting some unexpected behavior when using list.remove(x), wondering if
someone can tell me what's going on.

I have a list of 2 kinds of objects, such as [a, a, b, b, a, b].  I wan't to
delete all the a objects out of the list while preserving the order of the b
objects.  My code looks like this:

for o in olist:
    if (o.type == a):
       olist.remove(o)

Now for some reason I get a left over a object that wasn't removed.  Anyone
know why?  Using python 1.5.2.

thanks,
david