[Python-Dev] PEP 460 reboot

[Barry Warsaw]

On Jan 13, 2014, at 02:13 PM, Donald Stufft wrote:

>
>On Jan 13, 2014, at 1:58 PM, Guido van Rossum <guido at python.org> wrote:
>
>> I hear the objections against b'%s' % 'x' returning b"'x'" loud and
>> clear, and if the noise about that sub-issue is preventing folks from
>> seeing the absurdity in PEP 460, we can talk about a compromise, e.g.
>> use %b which would require its argument to be bytes. Those bytes
>> should still probably be ASCII-ish, but there's no way to test that.
>> That's fine with me and should be fine to Nick as well -- PEP 460
>> doesn't check that your encodings match (how could it? :-), nor does
>> plain string concatenation using +.
>
>I think disallowing %s is the right thing to do, but I definitely think
>numbers and %b should be allowed.

I guess I agree.  The behavior of b'%s' % 'x' returning b"'x'" is almost
always useless at best.  (I would have thought maybe %a for ascii() but don't
care that strongly.)

-Barry
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