f-string roadmap? about pyupgrade

[asottile]

I haven't started working on it yet, unfortunately.

My plan is to start with simple replacements, ones that are unlikely to break other linters:

'foo {}'.format(bar)  # f'foo {bar}'  ## no linebreaks, strictly *shortens* the line
'foo {bar}'.format(bar=bar) # f'foo {bar}'  ## same
# maybe simple attribute accesses
'foo {}'.format(bar.baz)  # f'foo {bar.baz}'

And then expand from there!

My current WIP is implementing % formatting, where I'll likely be able to reuse some of the logic for f-strings: https://github.com/asottile/pyupgrade/tree/percent_format

But unsurprisingly, I have copious amounts of freetime ;) (sarcasm) so I haven't really had much time to work on either of those adventures.