argparse optional subparser (for --version)

Question

I have the following code (using Python 2.7):

# shared command line options, like --version or --verbose
parser_shared = argparse.ArgumentParser(add_help=Fal         


        

Answer 1

While we wait for this feature to be delivered, we can use code like this:

# Make sure that main is the default sub-parser
if '-h' not in sys.argv and '--help' not in sys.argv:
    if len(sys.argv) < 2:
        sys.argv.append('main')
    if sys.argv[1] not in ('main', 'test'):
        sys.argv = [sys.argv[0], 'main'] + sys.argv[1:]