Python多进程

进程（与线程基本一致）：multiprocessing 模块

进程  ：一堆资源的集合；图片、文字、线程

1、创建、启动进程、进程锁
    p = multiprocessing.Process(target=create_data,args=(1,)) #进程
    p.start() #启动进程
    multiprocessing.active_children()  #进程数
    lock = multiprocessing.Lock() #进程锁

import multiprocessing
import threading
import time
# lock = multiprocessing.Lock()

def create_data(number):
    print("data..",number)
    time.sleep(2)


if __name__ == '__main__':
    for i in range(5):
        p = multiprocessing.Process(target=create_data,args=(1,)) #进程
        p.start()
    while len(multiprocessing.active_children())!=1: #等待子进程
        pass
    print("运行完成！")

2、进程池：
p = multiprocessing.Pool() #创建进程池；参数是进程池数，默认进程池数量是CPU的核心数
p.close() #关闭进程池
p.join() #等待子线程都执行完成

import multiprocessing
import time
import os
qq_numbers = ["511402865","260303838","1099276647","1490768397","729226162",
      "1164019076","569380213","923296994","330547222","609924484","1054114694",
      "854795345"]

def create_data(number):
    print("data..",number)
    time.sleep(2)
if __name__ == '__main__':
    print(os.cpu_count())
    p = multiprocessing.Pool()

    for qq in qq_numbers:
        p.apply_async(create_data,args=(qq,))

    p.close()
    p.join() #等待子线程都执行完成

    print("done!")