["python","subprocess"]
Is there a way to check if a subprocess is still running?

I'm launching a number of subprocesses with subprocess.Popen in Python. I'd like to check whether one such process has completed. I've found two ways of checking the status of a subprocess, but both seem to force the process to complete. One is using process.communicate() and printing the returncode, as explained here: checking status of process with subprocess.Popen in Python. Another is simply calling process.wait() and checking that it returns 0. Is there a way to check if a process is still running without waiting for it to complete if it is?
Ouestion: ... a way to check if a process is still running ... You can do it for instance: p = subprocess.Popen(... """ A None value indicates that the process hasn't terminated yet. """ poll = p.poll() if poll is None: # p.subprocess is alive Python » 3.6.1 Documentation popen-objects Tested with Python:3.4.2