def tcpPortScan(ip, port, openPort):
 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 创建套接字
 sock.settimeout(0.1)   # 设置延时时间
 try:
  result = sock.connect_ex((ip, port))
  if result == 0:    # 如果连接成功，返回值为0
   openPort.append(port) # 如果端口开放，就把端口port赋给openPort
 except:
  pass
 sock.close()     # 关闭套接字

def threadingPortScan(host, portList, openPorts = []):
 
 hostIP = socket.gethostbyname(host) # 获取域名对应的IP地址
 nloops = range(len(portList))
 threads = []
 
 for i in nloops:
  t = threading.Thread(target=tcpPortScan, args=(hostIP, portList[i], openPorts))
  threads.append(t)
 
 for i in nloops:
  threads[i].start()
 
 for i in nloops:
  threads[i].join()
 return openPorts  # 返回值为该域名下开放的端口列表

# -*- coding:utf-8 -*-
'''
使用多线程，检测一个目标地址的端口开放情况，目标地址由用户输入，端口暂时定义为0~1024,
检测TCP连接是否成功，如果连接成功，则端口开放，不成功则端口关闭
'''
 
import socket
import threading
 
def main():
 host = input('please input domain:')
 portList = range(0, 1025)
 openPorts = threadingPortScan(host, portList)
 print(host,'open ports:', openPorts)
 
# 对给定的(ip, port)进行TCP连接扫描
def tcpPortScan(ip, port, openPort):
 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 创建套接字
 sock.settimeout(0.1)   # 设置延时时间
 try:
  result = sock.connect_ex((ip, port))
  if result == 0:
   openPort.append(port) # 如果端口开放，就把端口port赋给openPort
 except:
  pass
 sock.close()     # 关闭套接字
 
 
def threadingPortScan(host, portList, openPorts = []):
 
 hostIP = socket.gethostbyname(host) # 获取域名对应的IP地址
 nloops = range(len(portList))
 threads = []
 
 for i in nloops:
  t = threading.Thread(target=tcpPortScan, args=(hostIP, portList[i], openPorts))
  threads.append(t)
 
 for i in nloops:
  threads[i].start()
 
 for i in nloops:
  threads[i].join()
 return openPorts  # 返回值为该域名下开放的端口列表
 
if __name__ == '__main__':
 main()

>please input domain: www.qq.com
www.qq.com open ports: [80, 843]