Context manager, atexit processing, and PEP 3143 DaemonContext.close

[Ben Finney]

MRAB <google at mrabarnett.plus.com> writes:

> Gunter Henriksen wrote:
> > If there is a function which triggers a one-shot switch, I like to
> > have a way to find out if it has already been triggered, I prefer to
> > have the function tell me if it triggered the switch or not, but I
> > would not want that to be by raising an exception.
> 
> The 'file' class also has a 'closed' method, so that's a good model to
> follow.

Yes, I find that convincing as well. (I might prefer it to instead
answer the question “is it currently open?”, i.e. an ‘opened’ query,
but that makes for more awkward English than ‘closed’.)

-- 
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Ben Finney