argparse: determine if the value is default or entered by user

Asked Jan 10 '21 at 08:51

Active Jan 10 '21 at 09:17

Viewed 34 times

I have the following code:

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-option', choices=['a','b','c'],type=str, default='a')
args = parser.parse_args(['-option','a'])
print(args)

resulting namespace object:

Namespace(option='a')

If I run the parse_args() without passing any argument I also get:

Namespace(option='a')

Is there a way to differentiate if the option was given by the user or it was set by the default value?

asked Jan 10 '21 at 08:51

Mohammad Mouadi

2

The purpose value if to get the value no matter if the user gives it or not. You may use another solution, remove the default, and add the logic in your python code later – azro Jan 10 '21 at 08:53
Don't provide default value and test for `None` – Chayim Friedman Jan 10 '21 at 08:53
What's the context - why do you need to differentiate? – jonrsharpe Jan 10 '21 at 08:59
@ChayimFriedman I think this is the only way – Mohammad Mouadi Jan 10 '21 at 10:05

argparse: determine if the value is default or entered by user

0 Answers0