#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Splitting input based on a pattern.
     """
     #end_pymotw_header
     
     import re
     
     text = 'Paragraph one\non two lines.\n\nParagraph two.\n\n\nParagraph three.'
     
     for num, para in enumerate(re.findall(r'(.+?)\n{2,}', text, flags=re.DOTALL)):
         print num, repr(para)
         print