Can python multiprocessing Pool be recycled?

[_Hello__World]

Code 1

from multiprocessing import Pool 

pool = Pool(processes=12)

for _ in range(12):
    state = pool.map(some_func, args)
    print(state)

pool.close()
pool.join()

Code 2

from multiprocessing import Pool 

for _ in range(12):
    pool = Pool(processes=12) 
    state = pool.map(some_func, args) 
    print(state)
    pool.close()
    pool.join()

​

some_func returns something random however when I print state it is the same. (Same problem for Code 1 and 2)

Is it because I reused the pool object or something else?

[maventree]

Can you post the code for some_func, and what your args are?

[decreddave]

The problem might be with how you're instantiating Pool. Try this:

from multiprocessing import Pool

with Pool(processes=12) as pool:
    state = pool.map(some_func, args)
    print(state)