In python's argparse module, how can I disable printing subcommand choices between curly brackets?

Question

How can I disable printing subcommand choices, the ones between curly brackets? Using an example at http://docs.python.org/dev/library/argparse.html#sub-commands, the normal output is:

usage:  [-h] {foo,bar} ...

optional arguments:
-h, --help  show this help message and exit

subcommands:
{foo,bar}   additional help

What I want is to print this:

usage:  [-h] {foo,bar} ...

optional arguments:
-h, --help  show this help message and exit

subcommands:

Removing just the last line.

Answer 1

To avoid spamming my users with the huge ugly curly-braced list of dozens of sub-commands, I simply set the metavar attribute of the subcommand object. My code looks like:

import argparse
parser = argparse.ArgumentParser(description='Stack Overflow example')
subs = parser.add_subparsers()
subs.metavar = 'subcommand'
sub = subs.add_parser('one', help='does something once')
sub = subs.add_parser('two', help='does something twice')
parser.parse_args()

And the output of running this script with a single -h argument is:

usage: tmp.py [-h] subcommand ...

Stack Overflow example

positional arguments:
  subcommand
    one       does something once
    two       does something twice

optional arguments:
  -h, --help  show this help message and exit

The result is not exactly what you illustrate as your best desired case, but I think that it may be the closest you can get without subclassing argparse.ArgumentParser and overriding the things you need adjusted, which would be messy work.