Good morning all. I’m trying to run a test example of multiprocessing in SageMath 10.3 on Jupyter. I get an error saying that the lookup for the function “task” failed. I’m a bit new to this, and am wondering where I’m going wrong. Is there a package I forgot to install or something? Thanks. Eric
PicklingError: Can’t pickle <function task=“” at=“” 0x15676bc40=“”>: attribute lookup task on sage.all_cmdline failed
reset()
from random import random
from time import sleep
from multiprocessing.pool import Pool
def task(identifier):
# generate a value
value = random()
# report a message
print(f'Task {identifier} executing with {value}', flush=True)
# block for a moment
sleep(value)
# return the generated value
return value
def eric():
# create and configure the process pool
with Pool() as pool:
# execute tasks in order, process results out of order
for result in pool.imap_unordered(task, range(50)):
print(f'Got result: {result}', flush=True)
eric()