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

Ethan Furman ethan at stoneleaf.us
Fri Jan 10 23:58:15 CET 2014

On 01/10/2014 02:42 PM, Antoine Pitrou wrote:

On Fri, 10 Jan 2014 17:33:57 -0500 "Eric V. Smith" <eric at trueblade.com> wrote:

On 1/10/2014 5:29 PM, Antoine Pitrou wrote:

On Fri, 10 Jan 2014 12:56:19 -0500 "Eric V. Smith" <eric at trueblade.com> wrote:

I agree. I don't see any reason to exclude int and float. See Guido's messages http://bugs.python.org/issue3982#msg180423 and http://bugs.python.org/issue3982#msg180430 for some justification and discussion. If you are representing int and float, you're really formatting a text message, not bytes. Basically if you allow the formatting of int and float instances, there's no reason not to allow the formatting of arbitrary objects through str. It doesn't make sense to special-case those two types and nothing else. It might not for .format(), but I'm not convinced. But for %-formatting, str is already special-cased for these types. That's not what I'm saying. str.mod is able to represent all kinds of types through %s and calling str. It doesn't make sense for bytes.mod to only support int and float. Why only them?

Because embedding the ASCII equivalent of ints and floats in byte streams is a common operation?

-- Ethan

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