python - Argparse: parse multiple subcommands -


did research, couldn't find working solution. i'm trying parse following command line, 'test' , 'train' 2 independent subcommands each having distinct arguments:

./foo.py train -a 1 -b 2  ./foo.py test  -a 3 -c 4 ./foo.py train -a 1 -b 2 test -a 3 -c 4

i've been trying using 2 subparsers ('test','train') seems 1 can parsed @ time. great have subparsers parents of main parser such that, e.g. command '-a' doesn't have added both subparsers 'train' , 'test'

any solution?

this has been asked before, though i'm not sure best way of finding questions.

the whole subparser mechanism designed 1 such command. there several things note:

  • add_subparsers creates positional argument; unlike optionals `positional acts once.

  • 'add_subparsers' raises error if invoke several times

  • the parsing built around 1 such call

one work around we've proposed in past 'nested' or 'recursive' subparers. in other words train setup takes subparser. there's complication whether subparsers required or not.

or can detect , call multiple parsers, bypassing subparser mechanism.

from sidebar

multiple invocation of same subcommand in single command line

and

parse multiple subcommands in python simultaneously or other way group parsed arguments


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