[Python-Dev] PEP 549: Instance Properties (aka: module properties)

[Ivan Levkivskyi]

@Guido
> One would have to introduce some kind of convention
> where you can write properties with a leading _

One doesn't even need the @property decorator in this case.
For example:

def __getattr__(name):
    g = globals()
    name = '_' + name
    if name in g:
        return g[name]()
    raise AttributeError(...)

def _attr():
    "do something"
    return actual_object

One can even write a decorator that would change the name automatically
(but this will require a call at the end of module to unbind original
names).
The space for play is infinite. The question is what exactly is needed.
I would say that already basic customisation (like __getattr__) will be
enough.
IIUC, this will be actually a bit faster than setting __class__ since only
"customized"
attributes will be affected.

--
Ivan
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