gevent监测单线程下的io进行切换

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gevent监测单线程下的io进行切换

from gevent import monkey;monkey.patch_all() import gevent import time def eat(name): print('%s eat 1' % name) time.sleep(3) print('%s eat 2' % name) def play(name): print('%s play 1' % name) time.sleep(4) print('%s play 2' % name) g1=gevent.spawn(ea…

Python 37 基于多线程实现套接字、gevent 、单线程下实现并发的套接字通信

一:基于多线程实现套接字可添加多个客户端 from socket import * from threading import Thread def comunicate(conn): while True: # 通信循环 try: data = conn.recv(1024) if len(data) == 0: break conn.send(data.upper()) except ConnectionResetError: break conn.close() def server(i…

通过gevent实现单线程下的多socket并发

#通过gevent实现单线程下的多socket并发服务器 #server side import sys import socket import time import gevent from gevent import socket,monkey monkey.patch_all() def server(port): s = socket.socket() s.bind(('0.0.0.0', port)) s.listen(500) while True: cli, addr = s.…

单线程下实现IO切换

1.Greenlet greenlet可以实现两个任务之间的来回切换,但遇到IO会阻塞,不会切(使用这个模块之前需要在电脑命令提示符中输入 pip3 install greenlet 进行安装) 例如: from greenlet import greenlet import time def eat(name): print('%s eat 1' %name) time.sleep(30) #遇到IO不会切 g2.switch('alex') print('%s eat 2' %name) g…

gevent 实现单线程下的socket链接

通过gevent实现socket的多并发 server 端: import geventfrom gevent import socket, monkey monkey.patch_all() #进行IO标记 def server(port): s = socket.socket() s.bind(('localhost', port)) s.listen() while True: conn, addr = s.accept() gevent.spawn(handle, conn) #一接收信…

异步、+回调机制、线程queue、线程Event、协程、单线程实现遇到IO切换

# from concurrent.futures import ProcessPoolExecutor,ThreadPoolExecutor # import requests # import os # import time # import random # # def get(url): # print('%s GET %s' %(os.getpid(),url)) # response=requests.get(url) # time.sleep(random.randint(1,3…