[Python-Dev] properties on modules?

[Guido van Rossum]

> The Quixote web system publishes Python functions by traversing name
> spaces.  The publishing code is very roughly:
> 
>     def get_object(container, name):
>         if hasattr(container, name):
>             return getattr(container, name)
>         elif isinstance(container, ModuleType):
>             mname = container.__name__ + '.' + name
>             __import__(mname)
>             return sys.modules[mname]
>         else:
>             raise TraversalError
> 
>     def publish(path):
>         o = root_namespace
>         for component in '/'.split(path[1:]):
>             o = get_object(o, component)
>         return o()
> 
> If you use instances for name spaces then you can use __getattr__ or
> properties to lazily create attributes.  It's annoying that there is
> nothing like __getattr__/__setattr__ or properties for modules.  

I still don't see the use case for late binding of module attributes.

--Guido van Rossum (home page: http://www.python.org/~guido/)