@staticmethod verses multiple #extends inheritance

[Dirk van Oosterbosch, IR labs]

Hi,

I've been using Cheetah for a few years, but I've haven't been  
following the list or the developments closely.
And I remember that multiple inheritance wasn't possible with previous  
versions of Cheetah.

Now I'm reading that since v2.2.2 multiple inheritance is possible.  
Great! :-)
I read about the #@staticmethod decorator, and this recipe http://packages.python.org/Cheetah/recipes/staticmethod.html

What would be better to use if I would like to mix #def's of different  
template clases?
What's the difference between
#from foo import foo
and
#extends myclass, foo
?


Currently I'm using an Cheetah / pure python inheritance hierarchy to  
use different framework functionality and libraries throughout my  
different pages. Something like:
BaseSkeleton.tmpl
   -> ExtraComponents.tmpl
     -> PythonFramework.py
       -> page.tmpl
         -> typeA.tmpl
         -> typeB.tmpl
         -> typeC.tmpl
           -> subtypeC2.tmpl

Now I would like to use #def methods from typeA.tmpl in subtypeC2.tmpl.
And maybe also the other way around: use #def methods from  
subtypeC2.tmpl in typeA.tmpl

Would I be using the now possible multiple inheritance? Or the  
#@staticmethod decorator?

best regards
And thanks for keeping Cheetah alive and kicking!
dirk




--
-----------------------------
Dirk van Oosterbosch
de Wittenstraat 225
1052 AT Amsterdam
the Netherlands

http://labs.ixopusada.com
-----------------------------
--





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[R. Tyler Ballance-6]

On Tue, 10 Nov 2009, Dirk van Oosterbosch, IR labs wrote:

>
> Hi,
>
> I've been using Cheetah for a few years, but I've haven't been  
> following the list or the developments closely.
> And I remember that multiple inheritance wasn't possible with previous  
> versions of Cheetah.
>
> Now I'm reading that since v2.2.2 multiple inheritance is possible.  
> Great! :-)
> I read about the #@staticmethod decorator, and this recipe http://packages.python.org/Cheetah/recipes/staticmethod.html
>
> What would be better to use if I would like to mix #def's of different  
> template clases?
> What's the difference between
> #from foo import foo
> and
> #extends myclass, foo
> ?
>
>
> Currently I'm using an Cheetah / pure python inheritance hierarchy to  
> use different framework functionality and libraries throughout my  
> different pages. Something like:
> BaseSkeleton.tmpl
>    -> ExtraComponents.tmpl
>      -> PythonFramework.py
>        -> page.tmpl
>          -> typeA.tmpl
>          -> typeB.tmpl
>          -> typeC.tmpl
>            -> subtypeC2.tmpl
>
> Now I would like to use #def methods from typeA.tmpl in subtypeC2.tmpl.
> And maybe also the other way around: use #def methods from  
> subtypeC2.tmpl in typeA.tmpl
>
> Would I be using the now possible multiple inheritance? Or the  
> #@staticmethod decorator?

Depending on the method(s) and where they're used elsewhere, it could go either
way IMO.

If you're just using a small number of methods from typaA in subtypeC2 then I'd
just annotate them with a #@staticmethod decorator, otherwise I'd try multiple
inheritance. The same rules apply for Cheetah multiple inheritance as in
Python, so you want to make sure that typaA isn't squashing a method in typeC
and vice versa

> And thanks for keeping Cheetah alive and kicking!

No prob ;)

Cheers,
-R. Tyler Ballance
--------------------------------------
 GitHub: http://github.com/rtyler
Twitter: http://twitter.com/agentdero
   Blog: http://unethicalblogger.com



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