[Python-ideas] Draft PEP on string interpolation

[Guido van Rossum]

On Mon, Aug 24, 2015 at 1:44 PM, Nathaniel Smith <njs at pobox.com> wrote:

> From the early part of this discussion [1], I had the impression that
> the goal was that eventually string interpolation would be on by
> default for all strings, with PEP 498 intended as an intermediate step
> towards that goal. Is that still true, or is the plan now that
> interpolated strings will always require an explicit marker (like
> 'f')?
>

That was not received well, so I think it's dead.


> I ask because if they *do* require an explicit marker, then obviously
> the best thing is for the syntax to match that of .format. But, if
> this will be enabled for all strings in Python 3.something, then it
> seems like we should be careful now to make sure that the syntax is
> clearly distinct from that used for .format ("${...}" or "\{...}" or
> ...), because anything else creates nasty compatibility problems for
> people trying to write format template strings that work on both old
> and new Pythons.
>

Good point.


> (This is also assuming that f-string interpolation and the eventual
> plain-old-string interpolation will use the same syntax, but that
> seems like a highly desirable property to me..)
>
> -n
>
> [1] http://thread.gmane.org/gmane.comp.python.ideas/34980
>
> --
> Nathaniel J. Smith -- http://vorpus.org
>

-- 
--Guido van Rossum (python.org/~guido)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-ideas/attachments/20150824/66396388/attachment-0001.html>