temukan_ordernum.py

import re
import os, glob

order_num = []

filelist = glob.glob(os.path.join('.', 'feb_*.txt'))

re_order_num = re.compile('Order No: (?P<orderno>\d+)')

for f in filelist:
    data = open(f).read()
    r = re_order_num.search(data)
    if r:
        nomor_order = r.groupdict()['orderno']
        if nomor_order not in order_num:
            order_num.append(nomor_order)
            print f, nomor_order