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2019-10-24 Python

Argparse Getting Arguments Nicely In Python

Argparse getting arguments nicely in python#

Argparse is really cool.

No longer do we need to wrangle with sys.argv.

Example#

Say you want a program that takes a username and ip address:

./myscript.py foxxy445 192.168.0.1

You can handle that nicely with:

import argparse

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Link ip to username')
    parser.add_argument('username', type=str, help='Username')
    parser.add_argument('ip', type=str, help='IP address')

    input_args = parser.parse_args()

    ip = input_args.ip
    username = input_args.username

    # do something

Now validation is handled for you and also help:

python myscipt.py help

usage: myscipt.py [-h] username ip

Link ip to username

positional arguments:
username    Username
ip          IP address

optional arguments:
-h, --help  show this help message and exit

Sources#