Question

I am in Windows and Suppose I have a main python code that calls python interpreter in command line to execute another python script ,say test.py .

So test.py is executed as a new process.How can I find the processId for this porcess in Python ?

Update:

To be more specific , we have os.getpid() in os module. It returns the current process id.

If I have a main program that runs Python interpreter to run another script , how can I get the process Id for that executing script ?

Answer 1

If you used subprocess to spawn the shell, you can find the process ID in the pid property:

sp = subprocess.Popen(['python', 'script.py'])
print('PID is ' + str(sp.pid))

If you used multiprocessing, use its pid property:

p = multiprocessing.Process()
p.start()
# Some time later ...
print('PID is ' + str(p.pid))