#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Format a string of bytes for output.
     """
     #end_pymotw_header
     
     import binascii
     
     def to_hex(t, nbytes):
         "Format text t as a sequence of nbyte long values separated by spaces."
         chars_per_item = nbytes * 2
         hex_version = binascii.hexlify(t)
         num_chunks = len(hex_version) / chars_per_item
         def chunkify():
             for start in xrange(0, len(hex_version), chars_per_item):
                 yield hex_version[start:start + chars_per_item]
         return ' '.join(chunkify())
     
     if __name__ == '__main__':
         print to_hex('abcdef', 1)
         print to_hex('abcdef', 2)