[Bf-python] module consts / dictionary consts

[Joseph Gilbert]

Ken Hughes wrote:

> Asking for a clarification in my mind, so I know exactly what I should 
> be watching for while I'm reviewing the BPython code for API 
> inconsistencies:
>
> We've been discussing inplementing dictionary constants to replace 
> strings in the API refactoring.  There is also discussion of module 
> constants, which are implemented in some BPython modules 
> (http://wiki.blender.org/bin/view.pl/Blenderdev/UseOfConstantsInTheAPI).
>
> So are dictionary constants and module constants the same thing?  Are 
> dictionary constants more like Blender.Lamp.Type?  Or a combination of 
> both (i.e., making dictionaries of module constants)?

A module contant is a PyObject that resides in the namespace of the 
module of which it was added. There are 3 types of module constants:
1. a named object
2. a named integer
3. a named string
 By dictionary constant i assume you mean the PyContantObject in 
constant.c. This is basically a psuedo-dictionary that was originally 
meant to be loaded with key:value pairs. Then you would be able to call 
x = myconst['key'].

The way the wiki page out lines things you can load a single key:value 
pair into the dictionary and use the object as it'f the whole object as 
a constant. e.g. myconst == Module.Constant does a instance comparison) 
However it might be just as feasible to load a constant object with a 
series of key:value pairs. Such as:
{'constA': TEX_somedefine, 'constB':TEX_somethingelse, 'constC': 
TEX_doodoodo}
This isn't really useful though unless you load this as an object bound 
to the modules namespace imo. What might be useful is something like this:

const = pyConstant({key:value,key:value, key:value})
module_addobject("constants", const)

Blender.Module.constants['constant1']

This would be a better implementation if the PyConstant implements the 
keys/items/values iterface. That way you could call.
print Blender.Module.constants.keys()
to get a list of constants for that module. However either way is nice.

>
>
>
> Ken
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