Is it possible to add '-' flag in argparse of python3?

Question

Tools like dnsgen works with this both type of options:
Without any argument:
cat domains.txt | dnsgen - | someotherprogram
With argument:
dnsgen -w wordlist filename.txt

Can I make my program use - without argument i.e. dnsgen - style. Lets say my code is this and it can receive data from both stdin and wordlist

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-w', '--wordlist', help="Wordlist")
argv = parser.parse_args()
my_awesome_function(argv.wordlist)

So, my code reads only from wordlist. How can I make this both by wordlist and by stdin using - argument style?

Liju · Accepted Answer · 2020-09-11 10:11:35Z

1

May be not an elegant solution but, You can assign a dummy variable and make it store_true as below.

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-', "--_", action='store_true')
parser.add_argument('-w', '--wordlist', help="Wordlist")
argv = parser.parse_args()
my_awesome_function(argv.wordlist)

answered Sep 11, 2020 at 10:11

Liju

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