AttributeError: 当我在 python 3.6 中尝试并行处理时，模块 'concurrent' 没有属性 'futures'

Question

我正在尝试使用 concurrent.futures 模块将一个需要很长时间的进程拆分为多个进程。附上下面的代码

主功能：

with concurrent.futures.ProcessPoolExecutor() as executor:
for idx, score in zip([idx for idx in range(dataframe.shape[0])],executor.map(get_max_fuzzy_score,[dataframe[idx:idx+1] for idx in range(dataframe.shape[0])])):
    print('processing '+str(idx+1)+' of '+str(dataframe.shape[0]+1))
    dataframe['max_row_score'].iloc[idx] = score

get_max_fuzzy_score 函数：

def get_max_fuzzy_score(picklepath_or_list, df):
import numpy as np
extracted_text_columns = list(df.filter(regex='extracted_text').columns)
data_list = [df[data].iloc[0] for data in extracted_text_columns if not df[data].isnull().values.any()]
try:
    size = len(picklepath_or_list)
    section_snippet_list = picklepath_or_list
except:
    section_snippet_list = pickle.load(open(picklepath_or_list,'rb'))
scores = []
for section_snippet in section_snippet_list:
    for data in data_list:
        scores.append(fuzz.partial_ratio(data,section_snippet))
score = max(scores)

return score

该函数采用几列的值，并从先前构建的列表中返回最大模糊分数。

这是我得到的错误：

Traceback (most recent call last): File "multiprocessing.py", line 8, in <module> import concurrent.futures File "/home/naveen/anaconda3/lib/python3.6/concurrent/futures/__init__.py", line 17, in <module> from concurrent.futures.process import ProcessPoolExecutor File "/home/naveen/anaconda3/lib/python3.6/concurrent/futures/process.py", line 53, in <module> import multiprocessing File "/home/naveen/Documents/pramata-ie/data-science/scripts/multiprocessing.py", line 79, in <module> with concurrent.futures.ProcessPoolExecutor() as executor: AttributeError: module 'concurrent' has no attribute 'futures'

任何有关相同的帮助都会很棒。谢谢

Answer 1

您可以通过以下方式导入它：

import concurrent.futures

并以这种方式使用它：

executor = concurrent.futures.ThreadPoolExecutor(max_workers=num_workers).

您还可以通过这种方式导入 ThreadPoolExecutor：

from concurrent.futures.thread import ThreadPoolExecutor

并以这种方式使用它：

executor = ThreadPoolExecutor(max_workers=num_workers).