I can't tell what you mean, but you can start a process via subprocess.Popen, do some work, and wait for it to finish. https://docs.python.org/2/library/subprocess.html
Note that you don't need the stdout (or likely the stdin) of the process, you just need the return code -- whether or not grep succeeded -- so you can redirect stdout and stderr to os.devnull and avoid using .communicate(). Also, if you can't use .communicate(), but need to access stdout, this is the most common reason to need threads with subprocess. -- Devin On Wed, Jan 7, 2015 at 8:00 PM, Ganesh Pal <ganesh1...@gmail.com> wrote: > Hi friends, > > I'm trying to use threads to achieve the below work flow > > 1. Start a process , while its running grep for a string 1 > 2. Apply the string 1 to the command in step 1 and exit step 2 > 3. Monitor the stdout of step1 and print success if the is pattern found > > Questions: > > 1. Can the above be achieved without threads ? I prefer keep ing code simple > .threads can become confusion when this workflow grows larger > > Regards, > Ganesh > > > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
