getting ProcessId within Python code

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 exe

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))