How does one make argparse print usage when no options are provided on the command line?

Bruno Dupuis python.ml.bruno.dupuis at lisael.org
Wed Dec 5 18:42:37 CET 2012


On Wed, Dec 05, 2012 at 08:48:30AM -0800, rh wrote:
> I have argparse working with one exception. I wanted the program to print out
> usage when no command line options are given. But I only came across
> other examples where people didn't use argparse but instead printed out
> a separate usage statement. So they used argparse for everything but the
> case where no command line args are given.
> 

this is quite raw, but i'd add 

import sys
if len(sys.argv) == 1:
    sys.argv.append('-h')

before I call parser.parse_args()

Should work


-- 
Bruno Dupuis



More information about the Python-list mailing list