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Tue Oct 16 16:35:25 CEST 2012 · http://mail.python.org/pipermail/python-dev/2012-October/122193.html

On Tue, Oct 16, 2012 at 5:51 AM, nick.coghlan
<python-checkins at python.org> wrote:
> http://hg.python.org/cpython/rev/a3f27289ec68
> changeset:   79746:a3f27289ec68
> branch:      3.3
> +           except Exception as exc:
> +               print('%r generated an exception: %s' % (url, exc))
>             else:
> -               print('%r page is %d bytes' % (url, len(future.result())))
> +               print('%r page is %d bytes' % (url, len(data)))

I'm not suggesting this particular example be changed, but going
forward should we prefer the newer str.format() approach to
formatting?

http://docs.python.org/dev/library/stdtypes.html#printf-style-string-formatting

I've also seen references in the docs to the "old %-style formatting,"
but maybe old is meant more in the sense of having been around longer
than discouraged.

--Chris

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Tweak the threaded example in concurrent.futures