regexEntry.py

# Command Line :  python argy.py --myRegex "(^[A-Z]\d[A-Z]\d)"
# Check the Image : https://ibb.co/g3JPNb

import argparse
import re

parser = argparse.ArgumentParser(description='https://plus.google.com/u/0/101601879152225382803/posts/627K5E1DmMj?cfem=1')

parser.add_argument('--version', action='store_true', help='Shows version and exits.')

required_args = parser.add_argument_group('Required Arguments :')
required_args.add_argument('-mr', '--myRegex', nargs=1, help='Passes the Regex Pattern.')

args = parser.parse_args()

user_pattern = args.myRegex[0]

if not user_pattern:
	print("You did not tell me the Regex Pattern To Look For")
else:
	print("Your Pattern : {0}".format(user_pattern))
	my_string = "A1B2"
	# (^[A-Z]\d[A-Z]\d)
	m = re.compile("{0}".format(user_pattern))
	print(m.search(my_string).group(0))