def gen_rand_box_combo(self, pos_boxes):
used_boxes = []
pos_indices = [i for i in range(len(pos_boxes))]
random.shuffle(pos_indices)
temp = Backpack()
temp.reset_boxes()
count = 0
index = pos_indices[count]
while temp.add_box(pos_boxes[index]):
used_boxes.append(pos_boxes[index])
while pos_boxes[index] in used_boxes:
count += 1
if count >= len(pos_boxes):
return temp.boxes
index = pos_indices[count]
assert count < len(pos_indices)
return temp.boxes
