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 2 个对每个线程都相同的参数。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]

但是我不知道接下来要做什么

Answer 1

如果您不在乎顺序，您现在可以这样做：

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，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
    ))

如何在 Python 中使用 concurrent.futures

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