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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _from_numpy(data, origin=None, spacing=None, direction=None, has_components=False, is_rgb=False):
 """ Internal function for creating an ANTsImage """

    if is_rgb: has_components = True
    ndim = data.ndim
    if has_components:
        ndim -= 1
    dtype = data.dtype.name
    ptype = _npy_to_itk_map[dtype]

    data = np.array(data)

    if origin is None: origin = tuple([0.]*ndim)
    if spacing is None: spacing = tuple([1.]*ndim)
    if direction is None: direction = np.eye(ndim)

    libfn = utils.get_lib_fn('fromNumpy%s%i' % (_ntype_type_map[dtype], ndim))

    if not has_components:
        itk_image = libfn(data, data.shape[::-1])
        ants_image = iio.ANTsImage(pixeltype=ptype, dimension=ndim, components=1, pointer=itk_image)
        ants_image.set_origin(origin)
        ants_image.set_spacing(spacing)
        ants_image.set_direction(direction)
        ants_image._ndarr = data
    else:
        arrays = [data[i,...].copy() for i in range(data.shape[0])]
        data_shape = arrays[0].shape
        ants_images = []
        for i in range(len(arrays)):
            tmp_ptr = libfn(arrays[i], data_shape[::-1])
            tmp_img = iio.ANTsImage(pixeltype=ptype,
                                    dimension=ndim,
                                    components=1,
                                    pointer=tmp_ptr)
            tmp_img.set_origin(origin)
            tmp_img.set_spacing(spacing)
            tmp_img.set_direction(direction)
            tmp_img._ndarr = arrays[i]
            ants_images.append(tmp_img)
        ants_image = utils.merge_channels(ants_images)
        if is_rgb: ants_image = ants_image.vector_to_rgb()
    return ants_image