How to change only one part of a string?

Question

Python

I am sure that the question is not quite correct, but in general the essence is that I need only one part of the line to change on the screen.
Let's say it was written: Time has passed - 1s.
And only seconds changed, but the phrase "Time has passed" itself did not change its line.
Explained very vaguely, but I hope you understand.

Answer 1

time = 1
print('Время прошло - ' + str(time) + 'с'