My script should start a demo mode, when the no parameters are given. I tried this:
args = parser.parse_args()
if len(args) == 0:
# evaluate args
*** TypeError: object of type 'Namespace' has no len()
If your goal is to detect when no argument has been given to the command, then doing this via
argparse is the wrong approach (as Ben has nicely pointed out).
Think simple! :-) I believe that argparse does not depopulate
if not len(sys.argv) > 1, then no argument has been provided by the user.