[getopt-sig] The bake-off

[Guido van Rossum]

> There was some discussion about the use of conflicting options,
> resulting from the practice of aliasing commands. Whether things
> like "--verbose --quiet" were allowable proved to be a point of
> contention.

Hm, obviously the last option wins; it's a common trick to alias a
command to specify a bunch of default options, and it's useful to
override those explicitly by adding more options to the alias
invocation.

> > As an exercice in how easy each of the three alternatives makes it to
> > change the option set, I'd like to see each version augmented with
> > this feature.  There may be no config file yet, so maybe the default
> > values will have to be specified in a different way, like as globals.
> > The code to add that shouldn't be measured for the comparison below.
> 
> So, you need each example to include the extra baggage which sets default
> values.

Yes

> Do you want to see implementations of mechanisms for validating
> types and resolving option conflicts as well?

If you think it helps, sure.

--Guido van Rossum (home page: http://www.python.org/~guido/)