[Python-ideas] Add contextlib.DummyContext

[Brett Cannon]

On Wed, May 18, 2016, 10:12 Ethan Furman <ethan at stoneleaf.us> wrote:

> On 05/18/2016 06:16 AM, Giampaolo Rodola' wrote:
> > On Wed, May 18, 2016 at 1:36 AM, Devin Jeanpierre wrote:
>
> >>     with contextlib.ExitStack() as exit_stack:
> >>        if not bypass_lock:
> >>          exit_stack.enter_context(RedisLock())
> >>
> >> And similar.
> >>
> >> In fact, ExitStack can itself be used as a no-op context manager, if
> >>  you want.
> >
> > I didn't think about this. So yeah, my proposal is useless. Nevermind.
>
> Not at all.  It's a good use-case, and it helped introduce/remind us
> about ExitStack (which I suspect is a hidden gem).
>
> So thank you all!  :)
>

Python 3.6 also has a context manager ABC so you could also use that in 2
lines for a dummy context manager.

-brett


> --
> ~Ethan~
>
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