code: def chunkreverse(integers, dtype='L'):
      
      if dtype in ('B', 8):
          return map(RBYTES.__getitem__, integers)
  
      fmt = '{0:0%db}' % NBITS[dtype]
  
      return (int(fmt.format(chunk)[::-1], 2) for chunk in integers)
docs: Yield integers of dtype bit-length reverting their bit-order.
  
      >>> list(chunkreverse([0b10000000, 0b11000000, 0b00000001], 'B'))
      [1, 3, 128]
  
      >>> list(chunkreverse([0x8000, 0xC000, 0x0001], 'H'))
      [1, 3, 32768]