code: def _to_point(dims):
    
    assert dims
  
    if isinstance(dims, (tuple, list)):
      if len(dims) != 2:
        raise ValueError(
            "A two element tuple or list is expected here, got {}.".format(dims))
      else:
        width = int(dims[0])
        height = int(dims[1])
        if width <= 0 or height <= 0:
          raise ValueError("Must specify +ve dims, got {}.".format(dims))
        else:
          return point.Point(width, height)
    else:
      size = int(dims)
      if size <= 0:
        raise ValueError(
            "Must specify a +ve value for size, got {}.".format(dims))
      else:
        return point.Point(size, size)
docs: Convert (width, height) or size -> point.Point.