[Python-ideas] String interpolation for all literal strings

[Jonathan Slenders]

2015-08-07 9:33 GMT+02:00 Nick Coghlan <ncoghlan at gmail.com>:

> If f-strings are always eagerly interpolated
> prior to translation, then I can foresee a lot of complaints from
> folks asking why this doesn't work right:
>
>     print(_(f"This is a translated message with {a} and {b} interpolated"))
>


What if we decide to lazy-interpolate f-strings?
A creation of such an f-string, creates an f-string object. (Which has a
proper __repr__, so that it's transparent for those that don't care.)
Calling the __str__ method of the f-string triggers the interpolation.
This should give enough freedom to implement a working ugettext.

(But I still don't see any reason to go beyond supporting more than just is
simple variable name between the curly braces...)
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