code: def extend_regex(regexpr):
      r
      regex_map = {
          #r'\<': r'\b(?=\w)',
          #r'\>': r'\b(?!\w)',
          r'\<': r'\b' + positive_lookahead(r'\w'),
          r'\>': r'\b' + negative_lookahead(r'\w'),
          ('UNSAFE', r'\x08'): r'\b',
      }
      for key, repl in six.iteritems(regex_map):
          if isinstance(key, tuple):
              search = key[1]
          else:
              search = key
          if regexpr.find(search) != -1:
              if isinstance(key, tuple):
                  print('WARNING! Unsafe regex with: %r' % (key,))
              regexpr = regexpr.replace(search, repl)
      return regexpr
docs: r"""
      Extends the syntax of regular expressions by replacing convineince syntax
        with re friendly syntax. Nameely things that I use in vim like \<\>