parsing only a subset and leave all other checks undone

[ghost]

i try to extract just one optional arg also other nonoptionals might not have been supplied:

import argparse
parser.add_argument('d', help='dunt')
parser.add_argument('-c', help='copper')
args = parser.parse_known_args(args=['-c'])
 
usage: main.py [-h] [-c C] d
main.py: error: argument -c: expected one argument

It should only extract -c and leave d alone. I try to put -c into an external file which should silently do its thing without other arg checking , in this case 'd'. Why even throw on optional here.

violating the doc?

that it does not produce an error when extra arguments are present.

now if i try

parser.add_argument('-c', help='copper')
args = parser.parse_known_args(args=['-c'])

it throws on an optional one, shouldnt since c=None then

[ThomasWaldmann]

https://github.com/ThomasWaldmann/argparse/blob/master/README.txt

did you read this? closing.

[ghost]

Yes i did now, so file a bug report for the lib maintainers? i use 3.7 stdlib version (if it is one)

[ThomasWaldmann]

i didn't analyze your bug report, this is the wrong place in any case.

either ask on the python support channels or directly file a bug, if you are confident it is one.