Using `tmux` you can start a detached process, which is effectively "hidden", and re-attach it as and when you like. You can even close the launcing terminal session and re-attach your *tmux python process* from another terminal...

This example uses `watch` as the terminal command to run, but just substitute your python command... It starts the tmux session in an already deteched state. 


 tmux new -d -s my-watch 'watch -n 1 -d date' \;

To view the current state of the "hidden" (detached) session, just type `tmux attach` in a Terminal window...