Require either of two arguments using argparse

Question

Given:

import argparse

pa = argparse.ArgumentParser()
pa.add_argument(\'--foo\')
pa.add_argument(\'--bar\')

print pa.parse_args(\'--foo 1\'.split())
         


        

Answer 1

If you need some check that is not provided by the module you can always do it manually:

pa = argparse.ArgumentParser()
...
args = pa.parse_args()

if args.foo is None and args.bar is None:
   pa.error("at least one of --foo and --bar required")