exemplo de arg parse em python

argParser.py

import argparse

if __name__ == '__main__':
	# construct the argument parser and parse the arguments
	ap = argparse.ArgumentParser()
	ap.add_argument("-i", "--image", required=False,
					help="Path to the image to be scanned")
	args = vars(ap.parse_args())

	if args["image"] == None:
		image1 = "../testeCases/unknown/f.png"
		
	else:
		# load the image and compute the ratio of the old height
		# to the new height, clone it, and resize it
		image1 = args["image"]