python如何同时运行两个函数_Python中的多处理：完全同时执行两个函数

I want to execute the following two functions at exactly the same time.

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()

And I am getting a difference in microseconds. Is there any way to execute both at the exact same time? Any help would be appreciated.

解决方案

On the computer the following was written on, this code consistently prints out the same timestamps:

#! /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()