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[Question] Simple version printing

See original GitHub issue

1. Problem

In most programs, what I use, I can get version, use --version and -v command line arguments without additional parameters.

D:\SashaPythonista>python SashaAscent.py --version
Do Nothing version 0.2

D:\SashaPythonista>python SashaAscent.py -v
0.2

I don’t understand, how I can to create the same behavior, if I write a program, use Clize.

2. Attempts

1. First

from clize import run

VERSION = "0.2"


def program_version(version):
    print(VERSION)

run(program_version)

That get a version, I need input version, not --version:

D:\SashaPythonista>python SashaAscent.py version
0.2

D:\SashaPythonista>python SashaAscent.py --version
SashaAscent.py: Unknown option '--version'
Usage: SashaAscent.py version

2. Second

from clize import run

VERSION = "0.2"


def program_version(b="VERSION", *, version:'v'=True):
    """Show the version"""
    if version is True:
        b = "0.2"
        print(b)

run(program_version)

I need input -v b, not -v:

D:\SashaPythonista>python SashaAscent.py -v b
0.2

3. Third

from clize import run

VERSION = "0.2"


def do_nothing():
    """Does nothing"""
    return "I did nothing, I swear!"


def version():
    """Show the version"""
    print(VERSION)

run(do_nothing, alt=version)

It works for --version,

D:\SashaPythonista>python SashaAscent.py --version
0.2

but I don’t find, how I can to create alias -v.

4. Fourth

It works nice.

from clize import run

VERSION = "0.2"


def do_nothing():
    """Does nothing"""
    return "I did nothing, I swear!"


def version():
    """Show the version"""
    print(VERSION)


def v():
    """Show the version"""
    print(VERSION)

run(do_nothing, alt=[version, v])

But in --help menu -v is not --version alias.

Actual:

D:\SashaPythonista>python SashaAscent.py --help
Usage: SashaAscent.py

Does nothing

Other actions:
  -h, --help   Show the help
  --version    Show the version
  -v           Show the version

Expected:

D:\SashaPythonista>python SashaAscent.py --help
Usage: SashaAscent.py

Does nothing

Other actions:
  -h, --help     Show the help
  -v, --version  Show the version

Thanks.