python - 如何在Python中使用concurrent.futures

Question

我正在努力让多线程在 Python 中工作。我有一个函数，我想根据一个参数在 5 个线程上执行。我还需要每个线程都相同的 2 个参数。这就是我所拥有的:

from concurrent.futures import ThreadPoolExecutor

def do_something_parallel(sameValue1, sameValue2, differentValue):
    print(str(sameValue1))        #same everytime
    print(str(sameValue2))        #same everytime
    print(str(differentValue))    #different

main(): 

    differentValues = ["1000ms", "100ms", "10ms", "20ms", "50ms"]

    with ThreadPoolExecutor(max_workers=5) as executor:
        futures = [executor.submit(do_something_parallel, sameValue1, sameValue2, differentValue) for differentValue in differentValues]

但我不知道下一步该做什么

Answer 1

如果您不关心顺序，现在可以执行以下操作:

from concurrent.futures import as_completed

# The rest of your code here

for f in as_completed(futures):
    # Do what you want with f.result(), for example:
    print(f.result())

否则，如果您关心顺序，则使用 ThreadPoolExecutor.map 和 functools.partial 来填充始终相同的参数可能是有意义的:

from functools import partial

# The rest of your code...

with ThreadPoolExecutor(max_workers=5) as executor:
    results = executor.map(
        partial(do_something_parallel, sameValue1, sameValue2),
        differentValues
    ))