python use argparse to pass a filename code example

Example 1: python argparse file argument

import argparse

parser = argparse.ArgumentParser()
parser.add_argument('file', type=argparse.FileType('r'))
args = parser.parse_args()

print(args.file.readlines())

Example 2: use argparse that read in file usernames python script

use argparse that read in file usernames python script