Why no from __future__ import formatted_string_literals in Python <3.6?

Question

We had from __future__ import print_function in 2.7, so could we have from __future__ import formatted_string_literals in, say, 3.4 and 3.5 (maybe even 2.7)?

Is there some policy that prohibits this, some technical reason, or just nobody got around tuit yet?

Ref: PEP 498: Formatted string literals

Answer 1

Bringing f-strings to Python less than 3.6 is now covered at https://stackoverflow.com/a/46182112/8508004 . It is done via future-fstrings and simply requires a special line at the top of your code.

(I wanted to comment above but couldn't yet due to reputation restrictions for that.)

Answer 2

from __future__ imports are used to introduce incompatible changes, f-strings are a new feature and not a breaking change.