def __init__()

in transforms.py [0:0]


    def __init__(self, crop_size: int = 224, num_crops: int = 3):
        super().__init__()
        self.crop_size = crop_size
        if num_crops == 3:
            self.crops_to_ext = [0, 1, 2]
        elif num_crops == 1:
            self.crops_to_ext = [1]
        else:
            raise NotImplementedError(
                "Nothing else supported yet, "
                "slowfast only takes 0, 1, 2 as arguments"
            )