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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 bbox_to_slices(bbox):
 r""" Given a tuple containing bounding box coordinates, return a tuple of slice objects. A bounding box in the form of a straight list is returned by several functions in skimage, but these cannot be used to direct index into an image. This function returns a tuples of slices can be, such as: ``im[bbox_to_slices([xmin, ymin, xmax, ymax])]``. Parameters bbox : tuple of ints The bounding box indices in the form (``xmin``, ``ymin``, ``zmin``, ``xmax``, ``ymax``, ``zmax``). For a 2D image, simply omit the ``zmin`` and ``zmax`` entries. Returns ------- slices : tuple A tuple of slice objects that can be used to directly index into a larger image. """

    if len(bbox) == 4:
        ret = (slice(bbox[0], bbox[2]),
               slice(bbox[1], bbox[3]))
    else:
        ret = (slice(bbox[0], bbox[3]),
               slice(bbox[1], bbox[4]),
               slice(bbox[2], bbox[5]))
    return ret