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

Thomas Wouters thomas at python.org
Wed Mar 26 16:14:00 CET 2014

On Tue, Mar 25, 2014 at 11:37 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

In particular, %s will not accept numbers (use a numeric format code for that), nor str (encode it to bytes).

I don't understand this restriction, and there isn't a rationale for it in the PEP (other than "you can already use numeric formats", which doesn't explain why it's undesirable to have it anyway.) It is extremely common in existing 2.x code to use %s for anything, just like people use {} for anything with str.format. Not supporting this feels like it would be problematic for porting code. Did this come up in the earlier discussions?

-- Thomas Wouters <thomas at python.org>

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