Bug: Not completing subparsers

[shachargluska]

Hi, thanks for your great work.
I'm trying to get shtab to autocomplete my script, but I'm having trouble.
I don't seem to be able to get it to work with subparsers.

Env:
python: Python 3.6.9
shtab: shtab 1.4.1

A small example:

#!/usr/bin/env python
import argparse


def get_main_parser():
    parser = argparse.ArgumentParser(prog="pathcomplete")
    subs = parser.add_subparsers()
    sub = subs.add_parser('action')
    sub.add_argument("--sum", default=None)
    sub.add_argument("--other", default=None)
    return parser


if __name__ == "__main__":
    parser = get_main_parser()
    args = parser.parse_args()
    print(args)

shtab appears to work in the sense that it can complete "-h" and "--help" (so setup is most likely correct)
But I don't see "action" or its arguments.

[casperdcl]

Ah this was introduced in shtab>=1.4.0 (#47) but forgot to update examples/customcomplete.py.

Basically you need to "unhide" your subparsers by giving them help messages:

-    subs.add_parser('action')
+    subs.add_parser('action', help="some useful functionality")