A CLI for searching for a matching group and returning only that group (Rather than the entire matching line as grep does)

regex

#!/usr/bin/env python

import re
from sys import argv
if len(argv)<3:
    print("Usage:")
    print("{} <string> <pattern>".format(argv[0]))
    exit(2)


s = argv[1]
pattern = argv[2]

lines = s.split('\n')

for line in lines:
    match = re.search(pattern, line)
    if match is not None:
        result = match.groups()[0]
        print(result)