Another newbie getopt thread. ^_^

googleboy mynews44 at yahoo.com
Sun Jul 18 09:53:16 CEST 2004


Chris Cioffi <evenprimes at gmail.com> wrote in message news:<mailman.529.1090102630.5135.python-list at python.org>...
> On 17 Jul 2004 15:06:25 -0700, googleboy <mynews44 at yahoo.com> wrote:
> > Hiya!
> > 
> > I discovered getopt tonight after getting halfway through writing huge
> > amounts of looping statements to try to ensure that text entered as
> > parameters to my python app are within the bounds of what is allowed.
> [snip]
> 
> Look at the optparse module. 
> http://www.python.org/doc/2.3.4/lib/module-optparse.html
> 
> It allows you to define the parameter type, making it far easier to do
> any followup validation.  As a bonues, it provides automatic support
> for stuff like 'program --help'.


Thanks for the tip.  I am using 2.2 here,  but a bit of research
pointed me off to optik.sourceforge.net and it is all beginning to
really come together now.

There is one smallish issue I am having with getopt just at the
moment,  and that is with this bonus feature of automatic support for
-h, --help.  I have defined a whole bunch of things (like bugs,  my
email address, a preamble explaining the app's function) which I want
to print to the screen when someone requests help,  not just an
obvious usuge and options definition.  I think it is probably
fortunate that I have done it as 5 smaller strings instead of one huge
one, just in case there was a time when I wanted to use only a
subsection (like when someone puts in a bad value,  I will print a
small error referring to the incorrect option, and the syntax example
only.)

The docs and examples don't make it clear how to do this,  and when I
defined a -h, --help option it gave me a conflict error:

optik.errors.OptionConflictError: option -h/--help: conflicting option
string(s): -h, --help

Is there anyway around this?

Finally,  a quick one...  Is there a way for optparse to force an
integer to be between 0 and 100?  I am passing in percentage
values....  It isn't hard to make a validation on the integers
afterwards,  but I thought it might be nice to have this as part of
the optparse.

Thanks for the help!

googleboy.



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