python - Python 中的多处理 : execute two functions at the exact same time

Question

我想同时执行以下两个函数。

from multiprocessing import Process
import os
import datetime

def func_1(title):
    now = datetime.datetime.now()
    print "hello, world"
    print "Current second: %d" % now.second
    print "Current microsecond: %d" % now.microsecond

def func_2(name):
    func_1('function func_2')
    now = datetime.datetime.now()
    print "Bye, world"
    print "Current second: %d" % now.second
    print "Current microsecond: %d" % now.microsecond

if __name__ == '__main__':
    p = Process(target=func_2, args=('bob',))
    p.start()
    p.join()

我得到了以微秒为单位的差异。有没有办法同时执行两者？任何帮助将不胜感激。

Answer 1

在计算机上写了以下内容，此代码始终打印出相同的时间戳:

#! /usr/bin/env python3
from multiprocessing import Barrier, Lock, Process
from time import time
from datetime import datetime

def main():
    synchronizer = Barrier(2)
    serializer = Lock()
    Process(target=test, args=(synchronizer, serializer)).start()
    Process(target=test, args=(synchronizer, serializer)).start()

def test(synchronizer, serializer):
    synchronizer.wait()
    now = time()
    with serializer:
        print(datetime.fromtimestamp(now))

if __name__ == '__main__':
    main()