for ii in range(2): print "running", prog1,"..." command = "./"+prog1 starttime = time.time() commands.getoutput(command) timetaken = time.time() - starttime print timetaken prog1runtimes.append(timetaken) print "running", prog2,"..." command = "./"+prog1 starttime = time.time() commands.getoutput(command) timetaken = time.time() - starttime print timetaken prog2runtimes.append(timetaken)