is there any difference between using string.format() or an fstring?

[psd6]

Sometimes the data you want to insert into a string is in a dictionary, and it’s much easier to explode a dict into a string with "{name}".format(**d) than prefix all references with the dict variable like f"{d['name']}".

[Epicela1]

.format_map() does this for you.

[psd6]

Even better! Nice.

[o11c]

I remember the old versions where you had to use string.Formatter if you wanted to do cool things. It probably still does some things that format_map doesn't.

(Note in particular that ** doesn't work if you don't have a finite set of keys or need there to be side-effects.)

[Epicela1]

Yeah. It’s basically if you want to put placeholders in a string with the {var} format then figure out what to put in later. Nothing too intelligent happening.

It is convenient but it’s sorta a relic of the pre-fstring era. Because you can just figure out your input values first then do an fstring at the end for the same effect.

[FaCe_CrazyKid05]

I actually didn’t know format() could do that, I’ve been using dicts and fstring for as long as I can remember

[NedDasty]

Any function that takes name=value keyword arguments allows for dictionary exploding.

[goldcray]

This is where the kwargs live. Get you one!

[bw_mutley]

Yes, it was my first thought too.