code: def codepoints2bitstream(codepoints):
      
      if isinstance(codepoints, int):
          codepoints = [codepoints]
      for codepoint in codepoints:
          bit_string = byte2bit_string(codepoint)
          for bit in bit_string:
              yield int(bit)
docs: >>> list(codepoints2bitstream([0x48,0x45]))
      [0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0]
      >>> list(codepoints2bitstream(0x48))
      [0, 0, 0, 1, 0, 0, 1, 0]