Comment by roelschroeven

Personally I don't feel f-strings are an improvement at all, but I think I can see why people prefer them. But a significant improvement, that I don't see at all. Can someone explain why e.g.

    f'gcd({a}, {b}) = {math.gcd(a, b)}'

is so much better than

    'gcd({}, {}) = {}'.format(a, b, math.gcd(a, b))

In the .format() version, the formatting and the values are separate and that makes it more clear to see both the formatting and the values. I really like that separation. When the expressions get more complex, .format() doesn't really lose any clarity while f'' gets pretty unreadable quite fast IMO. Yes, you can simplify by assigning the expressions to variables, but .format() doesn't even need that.