As far as I know yes. It knows that the "usage" of that variable in an f-string is an actual reference to the variable vs just part of the string with the same

As far as I know yes. It knows that the "usage" of that variable in an f-string is an actual reference to the variable vs just part of the string with the same set of characters. Not sure what you mean by complicated expressions? If you mean the variable is referenced in a complicated statement with calcs or as part of a ternary operator, etc... AFAIK they are all supported. It even understands scope. So it won't go outside of the current scope where the variable is defined. PyCharm's refactoring is very neat. In certain instances it even "refactors" relative paths inside a string if you move the file being referenced. Moving files around is intelligent and all imports get fixed. It has neat naming-convention renaming (myVariable->my_variable). Lots of nice little quality-of-life features, which is why I think it is the best Python IDE out there atm. Give it a whirl, it's got a free community edition that is near 100% functional!