[Python-Dev] PEP 460 reboot

[Daniel Holth]

On Sun, Jan 12, 2014 at 8:27 PM, Ethan Furman <ethan at stoneleaf.us> wrote:
> On 01/12/2014 04:47 PM, Guido van Rossum wrote:
>>
>>
>> %s seems the trickiest: I think with a bytes argument it should just
>> insert those bytes (and the padding modifiers should work too), and
>> for other types it should probably work like %a, so that it works as
>> expected for numeric values, and with a string argument it will return
>> the ascii()-variant of its repr(). Examples:
>>
>> b'%s' % 42 == b'42'
>> b'%s' % 'x' == b"'x'" (i.e. the three-byte string containing an 'x'
>> enclosed in single quotes)
>
>
> I'm not sure about the quotes.  Would anyone ever actually want those in the
> byte stream?
>
> --
> ~Ethan~

Is there a formatting character that means "anything except a unicode
string" to prevent accidentally interpolating a Unicode string into a
bytes string without [a sane] encoding?