One optional argument which does not require positional arguments

Question

I have a question regarding python\'s argparse: Is it possible to have a optional argument, which does not require positional arguments?

Example:

parser.         


        

Answer 1

You get error: to few arguments because lat and lon arguments are required.

In [10]: parser.parse_args('--list-methods'.split())
ipython: error: too few arguments

but

In [11]: parser.parse_args('--list-methods 10 20'.split())
Out[11]: Namespace(lat='10', list_methods=True, lon='20', method='add')

You should make lat and lon arguments optional.