[Python-ideas] Add closing and iteration to threading.Queue

[Guido van Rossum]

On Sun, Oct 21, 2018 at 6:08 PM Nathaniel Smith <njs at pobox.com> wrote:
I'm not sure if this is an issue the way Queue is used in practice, but in
general you have to be careful with this kind of circular flow because if
your queue communicates backpressure (which it should) then circular flows
can deadlock.

Nathaniel, would you be able to elaborate more on the issue of
backpressure? I think a lot of people here are not really familiar with the
concepts and its importance, and it changes how you have to think about
queues and the like.

-- 
--Guido van Rossum (python.org/~guido)
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