如何修复或重组这种多处理模式以避免酸洗错误?

How to fix or reorganize this multiprocessing pattern to avoid pickling errors?

又一个pickling的问题...下面导致pickling错误。我认为这与范围界定或其他事情有关。我还不确定。

目标是拥有一个装饰器,它接受参数并用方法丰富函数。如果最好的方法是简单地显式构造 类 那么那很好,但这意味着对编写 "content".

的用户隐藏内容
import concurrent.futures
import functools

class A():
    def __init__(self, fun, **kwargs):
        self.fun = fun
        self.stuff = kwargs
        functools.update_wrapper(self, fun)
    def __call__(self, *args, **kwargs):
        print(self.stuff, args, kwargs)
        return self.fun(*args, **kwargs)

def decorator(**kwargs):
    def inner(fun):
        return A(fun, **kwargs)
    return inner

@decorator(a=1, b=2)
def f():
    print('f called')

executor = concurrent.futures.ProcessPoolExecutor(max_workers=10)

tasks = [f for x in range(10)]
fut = list()
for task in tasks:
    fut.append(executor.submit(task))
res = [x.result() for x in fut]
print(res)

错误是:

_pickle.PicklingError: Can't pickle <function f at 0x7fe37da121e0>: it's not the same object as __main__.f

我最终做了这样的事情:

def dill_wrapped(dilled, *args, **kwargs):
    fun = dill.loads(dilled)
    return wrapped(fun, *args, **kwargs)

您可能应该尽量避免使用它,但有时在装饰函数时确实需要它。