Problematic aug function

usedImages = []
rotations = [None, cv.ROTATE_90_CLOCKWISE, cv.ROTATE_180, cv.ROTATE_90_COUNTERCLOCKWISE]

for inputIDX in tqdm(iterable = range(NUMBER_OF_VARIANTS), desc="A Gerar",ncols=100):
    r = random.SystemRandom()
    placementGrid = PlacementGrid()
    placementGrid.Export(str(inputIDX))

    out_image = cv.resize(random.choice(random.choice(backgrounds).images).img.copy(),(TARGET_IMAGE_DIM,TARGET_IMAGE_DIM))

    out_mask = np.zeros((TARGET_IMAGE_DIM,TARGET_IMAGE_DIM), dtype=np.uint8)
    out_mask = cv.bitwise_not(out_image)

    for cell in placementGrid.squares:
        r = random.SystemRandom()
        pickedMaskedImage = r.choice(input)

        print("NEW CELL")
        print(usedImages)
        while pickedMaskedImage.image.name in usedImages:
            r = random.SystemRandom()
            #This r.choice is always picking the same element
            #pickedMaskedImage = r.choice(input)
            print(r.randint(0, len(input)-1))
            pickedMaskedImage = input[r.randint(0, len(input)-1)]
            #print(pickedMaskedImage.image.name)
            if len(usedImages) == len(input):
                usedImages = []
        usedImages.append(pickedMaskedImage.image.name)

        imageClone = pickedMaskedImage.image.img.copy()
        maskClone = pickedMaskedImage.mask.img.copy()

        rotation = r.choice(rotations)
        if rotation != None:
            imageClone = cv.rotate(imageClone, rotation)
            maskClone = cv.rotate(maskClone, rotation)

        imageClone = cv.resize(imageClone, cell.abs_size,interpolation=cv.INTER_CUBIC)
        maskClone = cv.resize(maskClone, cell.abs_size,interpolation=cv.INTER_CUBIC)

        for y in range(cell.abs_size[1]):
            for x in range(cell.abs_size[0]):
                out_mask[cell.cornerPoint[1] + y, cell.cornerPoint[0] + x] = maskClone[y, x]
                if maskClone[y, x] < 255:
                    out_image[cell.cornerPoint[1] + y, cell.cornerPoint[0] + x] = imageClone[y, x]
        print("CELL FINISHED")

    cv.imwrite(OUT_DIR+str(inputIDX)+".png", out_image)
    cv.imwrite(OUT_DIR+str(inputIDX)+"_mask_.png", out_mask)
    print("IMAGE WRITTEN")