preferred format for mapcalc strings in python addons?

[CarlosGrohmann]

Hi, is there a preferred way to make mapcalc strings in python addons?

Is it ok to use f-strings?

what is better, this:
gscript.mapcalc('{a} = (({c}-{b})/({c}+{b}))').format(a=var_a, b=var_b, c=var_c)

or this?
gscript.mapcalc(f'{var_a} = (({var_c}-{var_b})/({var_c}+{var_b}))')

[veroandreo]

AFAIK, format() syntax is preferred in general, not only for addons

[CarlosGrohmann]

ok thanks

[wenzeslaus]

The format function is needed for translatable strings, but otherwise, f-strings are recommend.

[petrasovaa]

The f-strings iare preferable, it's more modern syntax. There are some issues for using it with translatable strings, but that's not the case here. I think the format was preferable comparing to the old % syntax.

[CarlosGrohmann]

Thanks Anna. I really prefer f-strings

[wenzeslaus]

It should be noted that the function also supports string templates with $ but I believe that was introduced for compatibility with Bash syntax making the transition a little more convenient back in the day, but it does not have any advantages now. Notably, same as the f-string syntax, it does not quote map names automatically which is perhaps the only special thing the mapcalc function could do (but does not).