On Mon, Sep 22, 2008 at 7:16 AM, Tasos Latsas <[EMAIL PROTECTED]> wrote:
> Hello list,
> I tried the optparse example from the python library reference and it
> doesn't seem to work..what am I doing wrong?
> I keep getting the "incorrect number of arguments" message although i
> use the correct number..
>
> The example is here :
> http://docs.python.org/lib/optparse-putting-it-all-together.html
>
> if i edit the code and write:
> print parser.parse_args()
>
> I get:
> (<Values at 0xb7d3b9ec: {'verbose': False, 'filename': None}>, [])
>
> as you can see the argument list is empty
> I run the program as ./parser.py -q
> (i also tried 'python parser.py -q' but didnt help)
>
> Thank you in advance
> _______________________________________________
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
(I failed to send my original reply to the list)
Notice the Usage message when you run the example:
$ python parser.py -q
Usage: parser.py [options] arg
parser.py: error: incorrect number of arguments
"-q" is an option, not an argument. If you look at the example, you add options:
parser.add_option("-q", ...
The arguments are everything left over. In this case, they are not
used, but they are required. The following runs without issue:
$ python parser.py junk
$ python parser.py -v junk
reading None...
The bottom line is the example is just an example, not something you
can use as is.
--
Carlos Hanson
_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
