with statement and context managers
steve+comp.lang.python at pearwood.info
Thu Aug 4 20:40:08 EDT 2011
Thomas Rachel wrote:
> Am 03.08.2011 04:15 schrieb Steven D'Aprano:
> > but to me that looks badly wrong. Surely the spam context manager
> > object will exit after the first iteration, and always raise an
> > exception on the second? But I don't quite understand context
> > managers enough to be sure.
> Depends on the implementation. As already stated, a
> contextlib.contextmanager will only run once. But it is easy to turn it
> into a persistent one - which internally initializes as often as needed.
Thanks, that's exactly the sort of information I was after.
Thank you to everyone who answered.
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