python 基于gevent协程实现socket并发

client

import time
import socket
from threading import Thread
def client():
    sk = socket.socket()
    sk.connect(('127.0.0.1',9001))
    while True:
        sk.send(b'hello')
        msg = sk.recv(1024)
        print(msg)
        time.sleep(0.5)

for i in range(500):#协程
    Thread(target=client).start()

　　server

import socket
print(socket.socket)          # 在patch all之前打印一次
from gevent import monkey    # gevent 如何检测是否能规避某个模块的io操作呢?
monkey.patch_all()
import socket
import gevent
print(socket.socket)           # 在patch all之后打印一次,如果两次的结果不一样,那么就说明能够规避io操作
def func(conn):
    while True:
        msg = conn.recv(1024).decode('utf-8')
        MSG = msg.upper()
        conn.send(MSG.encode('utf-8'))

sk = socket.socket()
sk.bind(('127.0.0.1',9001))
sk.listen()

while True:
    conn,_ = sk.accept()
    gevent.spawn(func,conn)
# pip install -i https://pypi.tuna.tsinghua.edu.cn/simple