#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Show the groups within the matches for a pattern.
     """
     #end_pymotw_header
     
     import re
     
     def test_patterns(text, patterns=[]):
         """Given source text and a list of patterns, look for
         matches for each pattern within the text and print
         them to stdout.
         """
         # Show the character positions and input text
         print
         print ''.join(str(i/10 or ' ') for i in range(len(text)))
         print ''.join(str(i%10) for i in range(len(text)))
         print text
     
         # Look for each pattern in the text and print the results
         for pattern in patterns:
             print
             print 'Matching "%s"' % pattern
             for match in re.finditer(pattern, text):
                 s = match.start()
                 e = match.end()
                 print '  %2d : %2d = "%s"' % \
                     (s, e-1, text[s:e])
                 print '    Groups:', match.groups()
                 if match.groupdict():
                     print '    Named groups:', match.groupdict()
                 print
         return