python - Deleting/Removing the first N or last N from a sprites.Group() -


so let's have sprites group , added bunch of things it:

all_shelfs = pygame.sprite.group() shelf_tracking_list = []  #making shelfs build_lvl = height - 150 #group in xrange(100):     wid = random.randint(120,320)     pos = [random.randint(0, width-wid), random.randint(build_lvl-20, build_lvl), wid]     all_shelfs.add(shelf(pos[0],pos[1], pos[2]))     build_lvl = build_lvl - 60  #group b in xrange(100):     wid = random.randint(120,320)     pos = [random.randint(0, width-wid), random.randint(build_lvl-20, build_lvl), wid]     all_shelfs.add(shelf(pos[0],pos[1], pos[2]))     build_lvl = build_lvl - 60 #group c in xrange(100):     wid = random.randint(120,320)     pos = [random.randint(0, width-wid), random.randint(build_lvl-20, build_lvl), wid]     all_shelfs.add(shelf(pos[0],pos[1], pos[2]))     build_lvl = build_lvl - 60  shelf_tracking_list = all_shelfs.sprites()

how delete group example? first group added. noticed can't modify group using shelf_tracking_list

if keeping track of sprites in each group, use sprite.group.remove(*sprites) function remove entire group, specified in docs here: http://www.pygame.org/docs/ref/sprite.html#pygame.sprite.group.remove 

# group group_a = list() in xrange(100):     wid = random.randint(120,320)     pos = [random.randint(0, width-wid), random.randint(build_lvl-20, build_lvl), wid]     new_shelf = shelf(pos[0], pos[1], pos[2])     group_a.append(new_shelf)     build_lvl = build_lvl - 60 all_shelfs.add(group_a)

then when want remove entire group all_shelfs:

all_shelfs.remove(group_a)

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