When running a secondary python script:
subprocess.Popen, or subprocess.call or even execfile in a n
If you're using tmux, you can specify which target you want the command to run in:
tmux send -t foo.0 ls ENTER
So, if you've created a tmux session foo.0, you should be able to do:
my_command = 'ls'
tmux_cmd = ['tmux', 'send', '-t', 'foo.0', my_command]
p = subprocess.Popen(tmux_cmd)
I guess you want something like
subprocess.call(['xterm','-e','python',script])
Good old xterm has almost no frills; on a Freedesktop system, maybe run xdg-terminal instead. On Debian, try x-terminal-emulator.
However, making your program require X11 is in most cases a mistake. A better solution is to run the subprocesses with output to a log file (or a socket, or whatever) and then separately run tail -f on those files (in a different terminal, or from a different server over ssh, or with output to a logger which supports rsyslog, or or or ...) which keeps your program simple and modular, free from "convenience" dependencies.
You can specify the tty of the terminal window you wish the command to be carried out in:
ls > /dev/ttys004
However, I would recommend going for the tmux approach for greater control (see my other answer).