On Sun, May 13, 2007 at 04:56:15PM +0200, tomer filiba wrote:
> why not add __enter__ and __exit__ to generator objects?
> it's really a trivial addition: __enter__ returns self, __exit__ calls
> close().
> it would be used to ensure close() is called when the generator is
> disposed,
> instead of doing that manually. typical usage would be:
> with mygenerator() as g:
> g.next()
> bar = g.send("foo")
> -tomer
A better example may help to make your case. Would this do?
with mygeneratorfn() as g:
x = get_datum()
while g.send(x):
x = get_next(x)
The idea then is that you can't just use a 'for' loop (which will call
close() itself, IIRC) because you want access to the generator itself,
not just the return values from g.next().
I wouldn't have a problem with this proposal, but I consider the snippet
above to be fairly obscure Python already; the requirement to call
g.close() is not a great burden on someone capable of using g.send() et
al.
Dustin
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