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

Antoine Pitrou solipsis at pitrou.net
Thu Jan 9 20:30:53 CET 2014


On Fri, 10 Jan 2014 05:26:04 +1000 Nick Coghlan <ncoghlan at gmail.com> wrote:

We should probably include formatmap for consistency with the str API.

Yes, you're right.

>However, I > also added bytearray into the mix, as bytearray objects should > generally support the same operations as bytes (and they can be useful > especially for network programming).

So we'd define the format string as mutable to get a mutable result out of the formatting operations? This seems a little weird to me. It also seems weird for a format method on a mutable type to not perform in-place mutation.

It's consistent with bytearray.join's behaviour:

x = bytearray() x.join([b"abc"]) bytearray(b'abc') x bytearray(b'')

Regards

Antoine.



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