Python: How to make an option to be required in optparse?

Question

I\'ve read this http://docs.python.org/release/2.6.2/library/optparse.html

But I\'m not so clear how to make an option to be required in optparse?

I\'ve tried to

Answer 1

I would use argparse library that has this functionality embedded:

PARSER.add_argument("-n", "--namespace", dest="namespace", required=True,
              help="The path within the repo to the data base")

argparse reference