pyregex

pyregex.py

#!/usr/bin/env python

import argparse
import re

parser = argparse.ArgumentParser(description='Python regex validator.')
parser.add_argument('-r', '--regex', required=True, type=str, help='Regular expression')
parser.add_argument('-f', '--file', required=True, type=str, help='File path')

args = parser.parse_args()

r = re.compile(args.regex, re.IGNORECASE)

with open(args.file) as f:
    for line in f:
        if r.match(line):
            print (line.rstrip())