Process doesn't work but Thread work !

[mr_byte31]

I am just learning to work with multi threads/process.

I wrote this code and it works well:

import time
import concurrent.futures

numThreads = 3
def do_something(sec):
    print('start sleeping ',sec)
    time.sleep(sec)
    print('end sleeping ', sec)

sec = [5,4,3,2,1]

with concurrent.futures.ThreadPoolExecutor(max_workers = numThreads) as pool:
    pool.map(do_something, sec,timeout = 1)

when I switch from Thread to Process. Nothing is printed on the screen.
I think the code is not working at all.

import time
import concurrent.futures

numThreads = 3
def do_something(sec):
    print('start sleeping ',sec)
    time.sleep(sec)
    print('end sleeping ', sec)

sec = [5,4,3,2,1]

with concurrent.futures.ProcessPoolExecutor(max_workers = numThreads) as pool:
    pool.map(do_something, sec,timeout = 1)

any reason for this?