python argparse: make options mutually exclusive

Question

I am using argparse in my python scrip:

parser = argparse.ArgumentParser()
parser.add_argument('-A','--after-context'  , nargs=1, type=int)
parser.add_argument('-B','--before-context' , nargs=1, type=int)
parser.add_argument('-C','--context'        , nargs=1, type=int)
parser.add_argument('pattern'               , nargs='+')

args = parser.parse_args()

pattern is required, all other options are optional.

-A and -B can be used together, but neither -A or -B caan be combined with -C.

How can I specify this in my code?

question from:https://stackoverflow.com/questions/65940625/python-argparse-make-options-mutually-exclusive

Answer 1

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