How to change multiline output dynamically?

Question

Python

For example, there is such a line, divided by 2 through \n
my_string = f"Ответов: {i}\nОшибок: {i}"

Tried to change from

sys.stdout.write(output)        
sys.stdout.flush()

but it only changes the second line (inserting new 2's instead), leaving the first line unchanged.

How can I do that? Preferably without third-party libraries.