server端
import sys,socket,time,gevent
from gevent import socket, monkey
monkey.patch_all()#卡住每个进程

def server(port):
    s = socket.socket()
    s.bind(('0.0.0.0', port))
    s.listen(500)
    while True:
        cli, addr = s.accept()
        gevent.spawn(handle_request, cli)#起协程 把cli连接传给handle_request 遇到IO阻塞就切换

def handle_request(conn):# 类似socketserver的handle方法
    try:
        while True:
            data = conn.recv(1024)
            print("recv:", data)
            conn.send(data)
            if not data:
                break #关闭客户端

    except Exception as  ex:#打印异常
        print(ex)
    finally:
        conn.close()

if __name__ == '__main__':
    server(8001)

client端
 import socket
 
 HOST = 'localhost'  # The remote host
 PORT = 8001  # The same port as used by the server
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.connect((HOST, PORT))
 while True:
     msg = bytes(input(">>:"), encoding="utf8") #转成bytes类型
     if not msg:continue #输入为空 跳出循环又从第1行开始循环
     s.sendall(msg)
     data = s.recv(1024)
     # print(data)
 
     print('Received', repr(data))#repr格式化输出
 s.close()