Re: [matplotlib-devel] Several patches: kwargs cleanup, legend-kwargs, legend-fontsize

Hi there,

seems like we are synchronizing rather badly in our work and our messages to 
the list. :-)

> Before we reapply your patch to raise on bad kwargs, I think it's
> worth getting some input if we want to raise on nonexistent keys...

Ok, there's a point. I did not even think that there would be any controversy, 
but what you point out should certainly be considered.

Basically, this is a question about the philosophy of properties in general: 
Should properties be settable just per-object, or should settings be 
propagated to the children. I believe the current state is not fully 
consistent in that respect.

What you are proposing is an interesting idea, but if it is adopted, it should 
be done in general and not only in certain places. And in that case, it might 
become rather complex. Properties would have to be uniquely identifiable by 
name only. (I.e. all linewidths have to be called just "linewidth", so an 
object that contains different lines that should be configurable 
independently have to be split in separate sub-objects) The passing of 
properties should happen everywhere in the library - otherwise it will be 
more confusing than helpful.

Currently, it seems to me that there is a rather weak distinction between 
properties and just plain kwargs. This should probably be sorted out before 
adopting a policy of passing all kwargs on to the children.

And as for silently ignoring unknown arguments: I still do not really like 
that idea. It smells like a source of hard to find bugs.

Ciao,
Nobbi

-- 
_________________________________________Norbert Nemec
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