Linux command-line call not returning what it should from os.system?
What gets returned is the return value of executing this command. What you see in while executing it directly is the output of the command in stdout. That 0 is returned means, there was no error in execution.
Use popen etc for capturing the output .
Some thing along this line:
import subprocess as subp = sub.Popen(['your command', 'arg1', 'arg2', ...],stdout=sub.PIPE,stderr=sub.PIPE)output, errors = p.communicate()print outputor
import osp = os.popen('command',"r")while 1: line = p.readline() if not line: break print lineON SO : Popen and python
If you're only interested in the output from the process, it's easiest to use subprocess' check_output function:
output = subprocess.check_output(["command", "arg1", "arg2"]);Then output holds the program output to stdout. Check the link above for more info.
The simplest way is like this:
import osretvalue = os.popen("ps -p 2993 -o time --no-headers").readlines()print retvalueThis will be returned as a list