Can optparse do dependencies?

[Mike Erickson]

* Bob (bob.python at yahoo.com) wrote:
> I'd like to setup command line switches that are dependent on other
> switches, similar to what rpm does listed below. From the grammar below
> we see that the "query-options" are dependent on the query switch,
> {-q|--query}. Can "optparse" do this or do I have to code my own
> "thing"? Thanks.

After you pull your options and arguments from optparse, just check for
them, eg:

parser = optparse.OptionParser()
...
(options, args) = parser.parse_args()

if (option.q and not option.p):
	parser.error("you must use p to use q")

The meaning of -b doesn't change when it follows -a, but if you want
that, it is doable by extending optparse. There is even an example in
the very good "extending optik"[1] documentation available off the
sf.net site:

http://optik.sourceforge.net/

regards,

mike

[1]: optparse is also known as optik