Jupyter笔记本

我基本上使用的是多处理模块,我还在学习多处理的功能.我正在使用Dusty Phillips的书,这段代码属于它.

import multiprocessing  
import random
from multiprocessing.pool import Pool

def prime_factor(value):
    factors = []
    for divisor in range(2, value-1):
        quotient, remainder = divmod(value, divisor)
        if not remainder:
            factors.extend(prime_factor(divisor))
            factors.extend(prime_factor(quotient))
            break
        else:
            factors = [value]
    return factors

if __name__ == '__main__':
    pool = Pool()
    to_factor = [ random.randint(100000, 50000000) for i in range(20)]
    results = pool.map(prime_factor, to_factor)
    for value, factors in zip(to_factor, results):
        print("The factors of {} are {}".format(value, factors))

在Windows PowerShell上(不在jupyter笔记本上),我看到以下内容

Process SpawnPoolWorker-5:
Process SpawnPoolWorker-1:
AttributeError: Can't get …