在单线程下利用协程实现服务端并发的效果

import socket
from threading import Thread


client = socket.socket()
client.connect(('127.0.0.1',8080))

def c(client,i):
    while True:
        client.send(('hello %s'%i).encode("utf-8"))
        data = client.recv(1024)
        print(data.decode('utf-8'))

for i in range(400):
    t = Thread(target=c,args=(client,i))  # 客户端使用多线程实现并发模拟
    t.start()

import socket
from gevent import spawn
from gevent import monkey;

monkey.patch_all()


server = socket.socket()
server.bind(('127.0.0.1', 8080))
server.listen(5)


def talk(conn):
    while True:
        try:
            data = conn.recv(1024)  # 等待客户端发消息 阻塞态
            if len(data) == 0: break
            print(data.decode('utf-8'))
            conn.send(data.upper())
        except ConnectionResetError as e:
            print(e)
            break
    conn.close()


def c():
    while True:
        conn, addr = server.accept()  # 监听 等待客户端的连接  阻塞态
        spawn(talk,conn)


s1 = spawn(c)
s1.join()