multi processing synchronization in python

test.py

from multiprocessing import Process

def bigJob():
    #
    result = 0
    #
    for i in range(12345678):
        result += i
    print(result)
 
process_list = []

for i in range(12):
    p = Process(target=bigJob)
    p.start()
    process_list.append(p)
    
for process in process_list:
    process.join()
    
print('finished')