Why Processpoolexecutor Working Serially?

from concurrent.futures import ProcessPoolExecutor import os import time def parInnerLoop(item): print(f'Processing {os.getpid()} started on {item}') time.sleep(3) pri

Solution 1:

As mentioned by @Klaus, need to change from executor.submit(parInnerLoop(itemNo)) to executor.submit(parInnerLoop, itemNo).