code: def blk_coverage_1d(blk, size):
      
      rem = size % blk
      maxpix = size - rem
      return maxpix, rem
docs: Return the part of a 1d array covered by a block.
  
      :param blk: size of the 1d block
      :param size: size of the 1d a image
      :return: a tuple of size covered and remaining size
  
      Example:
  
          >>> blk_coverage_1d(7, 100)
          (98, 2)