Note : Using Python 2.7.12 in ubuntu 16.04.

(out, err) = municate() # Currently its blocking here Proc = subprocess.Popen(, stdout=subprocess.PIPE, shell=True) But atlast while redirecting stdout to a variable it gets blocked.Ĭan someone suggest me to fix it ? Or is there any other module available to do this other than subprocess.Popen ? g_flag = 0 import time import subprocess p subprocess.Popen('sleep 30', shellTrue) Better: p subprocess. Just run the command normally, then wait until Popen.poll returns not None.

I tried with subprocess.Popen, I am able to spawn as background process and kill after few secs. You dont need to use the shell backgrounding & syntax, as subprocess will run the process in the background by itself. Due to this, the multiprocessing module allows the programmer to fully leverage multiple processors on a given machine. It is how to spawn a subprocess which continues to run foregrounded after its parent/spawner terminates.In python I want to start another python script as background process and after few sec I need to kill that spawned process and get the stdout into a variable. The multiprocessing package offers both local and remote concurrency, effectively side-stepping the Global Interpreter Lock by using subprocesses instead of threads. In this case, the point of this question is not to script the submission of ssh credentials to ssh from within Python. Is there a way, only using python, to start/fork an interactive service (like ssh), by using subprocess or some comparable module, and have this forked child process remain alive in the foreground, even after its parent (python) has sys.exit()'d? The problem is, this solution requires the use of either 2 scripts (a bash script to run ssh, combined with the python script to return the arguments) or alternatively human intervention to type the bash command directly as formatted above. The result is, the python program terminates and the user interacts with ssh initialization. In this bash example, after the python script runs, it is replaced or rather substituted with its return value which is, in turn, provided as a input to the program ssh. I'm interested in learning how to achieve the python equivalent of the following bash command: ssh $(./resolve_ip.py) Assume there exists a python script resolve_ip.py which magically returns the string IP of a machine we care about.

Python spawn subprocess in background