How to use argparse in Python

import argparse

parser = argparse.ArgumentParser(
    description='What this program is going to do.'
)
parser.add_argument(
    '--image1_path', '-P1', type=str, default='./image/lake_michigan.jpg', help='path for image1'
)
parser.add_argument(
    '--image2_path', '-P2', type=str, default='./image/early_morning.jpg', help='path for image2'
)
args = parser.parse_args()

print(args.image1_path)
print(args.image2_path)