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Sat Jan 11 00:24:05 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-January/131172.html

On Fri, 10 Jan 2014 18:14:45 -0500
"Eric V. Smith" <eric at trueblade.com> wrote:
> 
> >> Because embedding the ASCII equivalent of ints and floats in byte streams
> >> is a common operation?
> > 
> > Again, if you're representing "ASCII", you're representing text and
> > should use a str object.
> 
> Yes, but is there existing 2.x code that uses %s for int and float
> (perhaps unwittingly), and do we want to "help" that code out?
> Or do we
> want to make porters first change to using %d or %f instead of %s?

I'm afraid you're misunderstanding me. The PEP doesn't allow for %d and
%f on bytes objects.

> I think what you're getting at is that in addition to not calling
> __format__, we don't want to call __str__, either, for the same reason.

Not only. We don't want to do anything that actually asks for a
*textual* representation of something. %d and %f ask for a textual
representation of a number, so they're right out.

Regards

Antoine.

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Showing content from https://mail.python.org/pipermail/python-dev/2014-January/131172.html below:

[Python-Dev] RFC: PEP 460: Add bytes % args and bytes.format(args) to Python 3.5