Can confirm. I replaced 1.5k instances in our code base in seconds using flynt and it knew the ones that couldn't be swapped out directly. Really great tool. You only ever need it once in your life, but that one time it's amazing.
Having not written Python in a long time until recently, I discovered fstrings. Are they the best choice for (nearly all) string formatting at least in new code? They seem to work pretty similarly to eg Ruby’s string interpolation.