Been a while since I started my own thread.

Basically what I'm trying to do is write a python script that is using the output of
Code:
vmstat -n 1
The language itself doesn't matter, the concept is I start a thread that executes that and it will be running in the background, and I want to periodically get the last line of input, which is leading to my question. I am only concerned with the last line in the vmstat output, if you run the command you notice every 1 second it will output something, I was wondering what I could pipe that to in order to only show the last line, if that is possible, or if anyone would have a better approach to it.