On 10 January 2014 07:41, Eric V. Smith <e...@trueblade.com> wrote: > I'm not sure how format_map helps in porting from 2 to 3, since it > doesn't exist in any version of 2. > > Although that said, it's no doubt a useful feature, just not useful in > code that supports both 2 and 3 with a single code base or when porting > to 3.
It's purely a matter of consistency with str - if we're adding binary interpolation back to Python 3 (which I have been persuaded is a good idea), then we should provide the same three typical spellings of the operation that str provides. Cheers, Nick. > > Eric. > > On 1/9/2014 4:02 PM, antoine.pitrou wrote: >> http://hg.python.org/peps/rev/8947cdc6b22e >> changeset: 5341:8947cdc6b22e >> user: Antoine Pitrou <solip...@pitrou.net> >> date: Thu Jan 09 22:02:01 2014 +0100 >> summary: >> PEP 460: add .format_map() >> >> files: >> pep-0460.txt | 6 +++++- >> 1 files changed, 5 insertions(+), 1 deletions(-) >> >> >> diff --git a/pep-0460.txt b/pep-0460.txt >> --- a/pep-0460.txt >> +++ b/pep-0460.txt >> @@ -24,12 +24,16 @@ >> similar in syntax to ``str.format()`` (accepting positional as well as >> keyword arguments). >> >> +* ``bytes.format_map(...)`` and ``bytearray.format_map(...)`` for an >> + API similar to ``str.format_map(...)``, with the same formatting >> + syntax and semantics as ``bytes.format()`` and ``bytearray.format()``. >> + >> >> Rationale >> ========= >> >> In Python 2, ``str % args`` and ``str.format(args)`` allow the formatting >> -and interpolation of bytes strings. This feature has commonly been used >> +and interpolation of bytestrings. This feature has commonly been used >> for the assembling of protocol messages when protocols are known to use >> a fixed encoding. >> >> >> >> >> _______________________________________________ >> Python-checkins mailing list >> python-check...@python.org >> https://mail.python.org/mailman/listinfo/python-checkins >> > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/ncoghlan%40gmail.com -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
