[Python-Dev] PEP 461: Adding % formatting to bytes and bytearray -- Final, Take 3

[Ethan Furman]

On 03/27/2014 11:59 AM, Guido van Rossum wrote:
>
> PS. I am not trying to be difficult. I honestly don't understand the use case yet, and the PEP doesn't do much to
> support it.

How's this?
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Compatibility with Python 2
===========================

As noted above, ``%s`` is being included solely to help ease migration from,
and/or have a single code base with, Python 2.  This is important as there
are modules both in the wild and behind closed doors that currently use the
Python 2 ``str`` type as a ``bytes`` container, and hence are using ``%s``
as a bytes interpolator.

However, ``%b`` should be used in new, Python 3 only code, so ``%s`` will
immediately be deprecated, but not removed until the next major Python
release.
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--
~Ethan~