python tiny regular expression utility which is aimed to be re-builder on emacs

reb.py

# reb.py - tiny regular expression utility which is aimed to be re-builder
#
# NOTE: on IDLE, you can copy'n paste following lines for ease to use.
""" -- FOR IDLE --
import sys
sys.path.append('d:\\g\\py')
from reb import reb
"""

import re

class t_reb():
    def __init__(self):
        self.__line = ''
        self.__re_str = ''
    def help(self):
        print """usage:
   reb.help()    print this usage
   reb.go()      interactive set and search loop (Ctrl-C --> quit)
   reb.values()  show current regexp and line"""
    def __search(self):
        rek = re.compile(self.__re_str)
        m = rek.match(self.__line)
        if m:
            print '  matched'
            for i, x in zip(range(1, len(m.groups())+1), m.groups()):
                print ' group(%d): \'%s\'' % (i, x)
        else:
            print '  not match'

    def __re(self, s):
        self.__re_str = s
        self.__search()

    def __line(self, s):
        self.__line = s
        self.__search()

    def values(self):
        print 're  :\'%s\'' % self.__re_str
        print 'line:\'%s\'' % self.__line

    def __i(self):
        ins = raw_input('re  :')
        if ins != '': self.__re_str = ins
        ins = raw_input('line:')
        if ins != '': self.__line = ins
        self.__search()

    def go(self):
        while 1:
            try:
                ins = raw_input('re [%s]:' % self.__re_str)
                if ins != '': self.__re_str = ins

                ins = raw_input('line [%s]:' % self.__line)
                if ins != '': self.__line = ins

                self.__search()
            except KeyboardInterrupt: break

reb = t_reb()
reb.help()
reb.go()