[Python-Dev] Extended Function syntax

[Samuele Pedroni]

From: "Paul Moore" <lists@morpheus.demon.co.uk>
> Oren Tirosh <oren-py-d@hishome.net> writes:
>
> > I agree. I don't see anything wrong with
> >
> > f=open('spam', 'r')
> > with autoclose(f):
> >    ...
>
> I *like* this way of doing autoclose files. Much better than the way
> I've been thinking
>
>     f = autocloser("spam")
>     with f:
>         ...
>
> > and I think that
> >
> > with autolock(obj):
> >    ...
> >
> > looks better than any other alternative proposed so far.
>
> On the other hand, I quite like
>
>     with lock:
>         ...
>
> (where lock is defined appropriately).
>
> I don't know. Does the fact that the same statement is best used in
> two subtly different ways (permanent object vs throwaway helper
> object) count as a disadvantage of the statement (in terms of
> teachability, if nothing else...)?

it depends on how you look at things, either your main object support the
'with' protocol or not:

with with_proto_supporting_object:
 ...

or it needs an adapter:

with with_proto_adpater(obj):
  ...

Anyway write the PEP and leave this behind you <wink>.