code: def print_codepoint_stream(codepoint_stream, display_block_count=8, no_repr=False):
      
      in_line_count = 0
  
      line = []
      for no, codepoint in enumerate(codepoint_stream, 1):
          r = repr(chr(codepoint))
          if "\\x" in r: # FIXME
              txt = "%s %i" % (hex(codepoint), codepoint)
          else:
              txt = "%s %s" % (hex(codepoint), r)
  
          line.append(txt.center(8))
  
          in_line_count += 1
          if in_line_count >= display_block_count:
              in_line_count = 0
              print "%4s | %s |" % (no, " | ".join(line))
              line = []
      if line:
          print "%4s | %s |" % (no, " | ".join(line))
  
      if in_line_count > 0:
          print
docs: >>> def g(txt):
      ...     for c in txt: yield ord(c)
      >>> codepoint_stream = g("HELLO!")
      >>> print_codepoint_stream(codepoint_stream)
      ... # doctest: +NORMALIZE_WHITESPACE
         6 | 0x48 'H' | 0x45 'E' | 0x4c 'L' | 0x4c 'L' | 0x4f 'O' | 0x21 '!' |