为什么我不能使用python模块同期期货课堂教学法？

Question

我想让我的类方法并行运行，但它只会产生一些我无法解决的错误。 我的代码是：

import concurrent.futures as futures

samples = ['asfd', 'zxcv', 'asf', 'qwer']

class test:
    def __init__(self, samples):
        maturedb = {}
        with futures.ProcessPoolExecutor() as exe:
            for samplename, dResult in exe.map(self.make_readdb, samples):
                maturedb[samplename] = dResult
        print(maturedb)

    def make_readdb(self, samplename):
        return samplename, 1

test(samples)

如果我在Ubuntu machine中运行此代码，会出现如下错误：

^{pr2}$

make_readdb方法只是简化为一个示例，但它是实际代码和 我需要让它平行。请帮忙。在

Answer 1

从docs：

The ProcessPoolExecutor class is an Executor subclass that uses a pool of processes to execute calls asynchronously. ProcessPoolExecutor uses the multiprocessing module, which allows it to side-step the Global Interpreter Lock but also means that only picklable objects can be executed and returned.

试试ThreadPoolExecutor

更新

我又看了一遍代码，问题是函数make_readdb-是test类的成员。你能重构这个功能吗？在