Named Groups

Part of Python's regular expression, but not Perl's

 >>> pat = re.compile(r"(?P<name>\w+) (?P<age>\d+)")
 >>> matches = pat.match("Maggie 2")
 >>> print matches.group("name")
 Maggie
 >>> print matches.group("age")
 2
 >>>

Here's a named group regular expression for the AC line

AC   (?P<ac_number>\w+);( (?P<ac_number>\w+);)*