John Hunter wrote:
[...]
> Isn't there a potential problem here?  The original validate funcs
> support conversion from a string to a value, but you are proposing
> using them here in a context where users will generally be supplying a
> (possibly bogus) value, but in general not a string.  So the existing
> funcs may not work wholesale, but might be easily adapted.

What about Fernando's ipython strategy: parse the rc file as python 
code, not as strings?  I don't think the changeover would be very hard; 
most of the present matplotlibrc file is commented out anyway, so unless 
users are doing lots of customization it would not be difficult for them 
to generate a matplotlibrc file in python form.

> 
> As for key validation, I was only suggesting you raise a helpful error
> message if the user supplies a bogus key.
> 
> As for traits, I think we are psychologically committed to them, and
> if you are looking for a good summertime project, this might be a good
> candidate.  It's not really a chainsaw question, because you could
That's why I brought it up--although every time I look at traits I pull 
back, worrying about the very large amount of machinery they involve. 
Are any real, live projects outside of enthought making major use of 
traits?  Or would we be the first?
> easily support traits in the Artist layer and rc layer w/o ripping out
> the fundamental organization, and we could write setter and getter
> support as thin warppers around traits to avoid significant API
> breakage.  There are deeper and more fundamental chainsaw like layers
> where traits would help us (eg transform updates on window resizes)
> but a clear cut first step would be to get the Artist properties
> traitified.
Actually, it could be completely split into two phases: first rcParams 
handling, second Artist properties, couldn't it?  Starting with rc would 
be nice because it would provide a gentler introduction and some 
experience; but I think that using traits for Artist properties can also 
be done piecemeal, so it shouldn't be too disruptive.
> 
> If you decide to go that route, let's sync up with the latest
> enthought tree first, though.

I am happy to see this in svn:

  Revision 12335, 13.4 kB (checked in by rkern, 4 weeks ago)
Array trait updated to use numpy idioms only.

Eric


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