pool.map

"""
探索pool.map多進程執行方式的實質
"""

from multiprocessing import Pool
from time import sleep
from datetime import datetime

class forMap:
    def __init__(self):
        self.name = '沒啥用的初始化'

    def forPrinit(self, i):
        sleep(i)
        print(i)
        return i ** 2

if __name__ == '__main__':
    s = datetime.now()
    tt = forMap()
    # 進程池中創建三個進程
    p = Pool(3)

    l = [2, 4, 6]
    rList = p.map(tt.forTest, l)
    print(rList)

    p.close()
    p.join()

    e = datetime.now()
    print('多進程執行時間：', e - s)


2
4
6
[4, 16, 36]
多進程執行時間： 0:00:06.273263