Python中向目标端口发送一个字符串，为什么没有得到响应

Question

import socket
import optparse
from threading import Thread
from unittest import result
 
def get_ip_status(ip,port):
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    ip='220.181.38.251'
    try:
        server.connect((ip,port))
        server.send('(ip,port)')#发送数据
        results=server.recv(100)#接收数据
        print('{0} port {1} is open\n'.format(ip, port)+str(results))#输出数据
    except Exception as err:
        print('{0} port {1} is not open\n'.format(ip,port))
    finally:
        server.close()

if __name__ == '__main__':
    host = '220.181.38.251'
    for port in range(20,100):
        t=Thread(target=get_ip_status,args=(host,int(port)))
        t.start()

Answer 1

一般是这样客户端发数据，服务器端接受数据，或者服务器端发送数据，客户端接受服务器发送的数据