The ThreadedProcessPoolExecutor class is an Executor subclass that uses a pool of process with an inner pool of threads on each process to execute calls asynchronously.
ThreadedProcessPoolExecutor is formed by a modified ProcessPoolExecutor that processes (with at most max_processes) that use a ThreadPoolExecutor instance (with at most max_threads) to run the given tasks.
If max_processes is None or not given, it will default to the number of processors on the machine.
If max_threads is None or not given, it will default to the number of processors on the machine, multiplied by 5.
Example
from concurrent.futures import as_completed
import math
from threadedprocess import ThreadedProcessPoolExecutor
import requests
RNGURL = "https://www.random.org/integers/?num=1&min=1&max=100000000&col=1&base=10&format=plain&rnd=new"
def get_prime():
n = int(requests.get(RNGURL).text)
if n % 2 == 0:
return (n, False)
sqrt_n = int(math.floor(math.sqrt(n)))
for i in range(3, sqrt_n + 1, 2):
if n % i == 0:
return (n, False)
return (n, True)
with ThreadedProcessPoolExecutor(max_processes=4, max_threads=16) as executor:
futures = []
for _ in range(128):
futures.append(executor.submit(get_prime))
for future in as_completed(futures):
print('%d is prime: %s' % future.result())1 maintainer
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