https://github.com/MichaelKim0407/flake8-use-fstring

• FS001: % formatting is used.

• FS002: .format formatting is used.

• FS003: f-string missing prefix (ignored by default).

Config options:
--percent-greedy, --format-greedy

• Level 0 (default): only report error if the value before % or .format is a string literal.

• Level 1: report error if a string literal appears before % or .format anywhere in the statement.

• Level 2: report any usage of % or .format.