Python进程

• 进程是计算机中的程序的一次运行活动,是系统进行资源分配和调度的基本单位,是操作系统结构的基础。
• 每一个服务至少有一个进程

  1、单进程

• 从上到下顺序执行 # coding:utf-8 # 开发时间：2022/07/13 21:37

def sing():for i in range(3):print(i, 'sing...')

def eating():for i in range(3):print(i, 'eatting...')

if name == 'main':sing()eating()

 ## 2、多进程 * 同时执行两个任务

coding:utf-8

开发时间：2022/07/13 21:43

import multiprocessingimport datetimeimport time

def sing():for i in range(3):print(datetime.datetime.now(), i, 'sing...')time.sleep(0.5)

def eating():for i in range(3):print(datetime.datetime.now(), i, 'eatting...')time.sleep(0.5)

if name == 'main':sing_process = multiprocessing.Process(target=sing)eatting_process = multiprocessing.Process(target=eating)

sing_process.start() eatting_process.start()  ## 3、带参数的单进程 ```Python # coding:utf-8 # 开发时间：2022/07/13 21:55 import time def sing(num): for i in range(num): print(i, 'sing...') time.sleep(0.5) def eating(num): for i in range(num): print(i, 'eatting...') time.sleep(0.5) if __name__ == '__main__': sing(3) eating(3)

4、带参数的多进程

# coding:utf-8 # 开发时间：2022/07/13 21:59 import multiprocessing import datetime import time def sing(num): for i in range(num): print(datetime.datetime.now(), i, 'sing...') time.sleep(0.5) def eating(num): for i in range(num): print(datetime.datetime.now(), i, 'eatting...') time.sleep(0.5) if __name__ == '__main__': sing_process = multiprocessing.Process(target=sing, args=(3,)) eatting_process = multiprocessing.Process(target=eating, kwargs={"num": 3}) sing_process.start() eatting_process.start()