On 2019-06-02 13:51, Steven D'Aprano wrote:
On Sun, Jun 02, 2019 at 11:52:02PM +1200, Greg Ewing wrote:
Armin Rigo wrote:
>You have the occasional big function that benefits a lot from being
>JIT-compiled but which contains ``.format(**locals())``.
There should be a lot less need for that now that we have f-strings.
I think you're forgetting that a lot of code (especially libraries)
either have to support older versions of Python, and so cannot use
f-strings at all, or was written using **locals before f-strings came
along, and hasn't been touched since.
Another case where f-strings don't help is when the template is
dynamically generated.
It may be that there will be less new code written using **locals() but
I don't think that the **locals() trick will disappear any time before
Python 5000.
We've had .format_map since Python 3.2, so why use
``.format(**locals())`` instead of ``.format_map(locals())``?
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