Re: [Pytables-users] Unbound nodes.

[Norbert N. <Nor...@gm...>]

Am Donnerstag 27 Januar 2005 10:16 schrieb Ivan Vilata i Balaguer:
> Actually, it is possible for Group to use _f_create* methods and have no
> knowledge of which kinds of nodes it supports.  One could register and
> deregister new Node classes into Group in this way:
>
> class MyNewLeaf(Leaf):
>   ... class definition ...
> Group._f_registerNode(MyNewLeaf)
>
> The _f_create* method would be created on-the-fly....

Maybe it is just me personally, but I find this kind of library-design 
extremely confusing. Of course, Python allows an extremely flexible design of 
libraries that would never be possible in other languages (my personal 
background is mostly C++). This flexibility calls for a lot of 
self-discipline.

My usual idea of a library is, that it is a fixed set of modules, containing a 
fixed set of classes offering a fixed set of methods. Any departure from this 
static picture means an additional step in understanding the library. It may 
be justified in many cases, but should still be avoided if there is no good 
reason for it.

Anyway: this is just my personal view as someone relatively new to Python...

Ciao,
Norbert

-- 
_________________________________________Norbert Nemec
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