Parse command line argument using argparse

Question

I have utility which pass multiple argument alongwith require element Could anyone provide some input How can I handle this scenario using argparse. Please find the sample code

#! /usr/bin/env python
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("-cdl", dest = "input_file")
args = parser.parse_args()
print args

Command Line :  python test_6.py -cdl sample (workfine)

utility also pass :  python test_6.py -cdl sample -cdl-sp -cdl-ck

The last two argument for tool.As my program I need to take sample file and ignore rest two argument without any error.In current code, it give me error

it should say "invalide choice: -cdl-sp" if you want to avoid this (which is not recommand) have a look at this one and may be you'll be able to test when an error occurs and fail silently stackoverflow.com/questions/18700634/… — user1593705
– user1593705, Commented Sep 10, 2013 at 8:13

hpaulj · Accepted Answer · 2013-09-10 13:27:39Z

1

args, rest = parser.parse_known_args()
print args
print rest

rest should equal

['-cdl-sp', '-cdl-ck']

answered Sep 10, 2013 at 13:27

hpaulj

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Comments

MatthieuW · Accepted Answer · 2013-09-10 09:05:36Z

1

You can just add options for the arguments you don't need.

parser.add_argument("-cdl-sp", dest = "sp",  action='store_true')
parser.add_argument("-cdl-sk", dest = "sk",  action='store_true')

answered Sep 10, 2013 at 9:05

MatthieuW

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3 Comments

user765443 Over a year ago

But it does not contain any value. python test_6.py -cdl sample -cdl-sp -cdl-ck

MatthieuW Over a year ago

With "action='store_true'" parser doesn't expect any value. You will get a boolean value true if argument is there, false if not.

user765443 Over a year ago

it is also valid statement but above solution works better for me.As I write wrapper for call tool and some user can add more option and I need not to change any code But thanks for reply

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