Retry:Question about optparse/OptionParser callback.

[Steven W. Orr]

I decided I could be more articulate. I hope this helps.

I'm writing a program that needs to process options. Due to the nature of 
the program with its large number of commandline options, I would like to 
write a callback to be set inside add_option.

Something like this:

parser.add_option("-b", action="callback", callback=optionhandlr, dest='b')

The Cookbook almost takes me there with a callback function that only 
works for an option called b that takes no argument:

def optionhndlr(option, opt_str, value, parser):
      if parser.values.b:
          raise OptionValueError("can't use %s after -b" % opt_str)
      setattr(parser.values, option.dest, 1)

but warns that "it needs a bit of work: the error message and the flag 
that it sets must be generalized". I do need to do my option processing in 
an option processor with many options and I'd both like to do it in one 
method (if possible) and learn a trick or two while I'm at it. Is it 
possible to have a single callback that could be used in the general case?

All I need is to be taught how to fish...

TIA

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