What operating system are you using? If MS Windows, you can use os.system('cls') to clear the console window before reprinting the progress display. Yes, yes, I know that clearing the screen isn't good because a) this won't work on Mac or GNU/Linux, b) it may cause users to lose any important data they had in the console before running your script, and c) it introduces security issues into your program *. This is what you're looking for though, right? So I guess we can make an exception for clearing the screen in this case...
* as "cls" is a program on Windows that does this, if someone were to put a program named "cls" into the same folder that this script was run out of, then Windows would execute that program rather than the native "cls". Hence, very large security issues. (Thanks to Siddhant Sanyam for bringing that to light.)
P.S. sys.stdout.write is only an output stream, much like the print expression. Although, sys.stdout.write will not put a newline after each call like print, and if you call print "somethinghere", with that comma after, it won't put a newline but it will put one space.
