Usage: $~/looper runSomePythonScript.py

#!/usr/bin/python
import subprocess
import time, sys

PYTHON = '/usr/bin/python'

def main():
    commands = [PYTHON]
    commands.extend(sys.argv[1:])
    
    print "Looping %s" % commands
    while True:
       subprocess.call(commands)
       print "4 seconds to restart"
       time.sleep(2)
       
       
if __name__ == "__main__":
    main()