Destruction of generator objects

[Kay Schluehr]

On Aug 11, 12:16 pm, Stefan Bellon <sbel... at sbellon.de> wrote:
> On Sat, 11 Aug, Kay Schluehr wrote:
> > On Aug 9, 1:14 am, Stefan Bellon <sbel... at sbellon.de> wrote:
> > > Sorry, I forgot to mention that I am forced to using Python 2.4.
> > It doesn't matter. You can use try...finally as well in Python 2.4.
> > It's just not possible to use except and finally clauses in one
> > statement such as:
>
> [snip]
>
> The problem is yield inside try-finally which is not possible in 2.4.
>
> --
> Stefan Bellon

Oh, yeah... i overlooked this.

Honestly, I'd recommend wrapping the generator into a function object,
create the resource on construction ( or pass it ) and destroy it
implementing __del__.

def gen_value(self):
    while True:
        yield self.iter.next()

class GeneratorObj(object):
    def __init__(self, obj, gen):
        self.iter = make_iter(obj)
        self.gen  = gen(self)

    def __del__(self):
        destroy(self.iter)

    def next(self):
        return self.gen.next()