# -*- coding: utf-8 -*-
"""
@ auth : carl_DJ
@ time : 2020-7-7
"""


import socket

def check_port(host,port):
 "检查端口是否被占用"

 #创建socket对象
 s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 try:
  s.connect((host,port))
  s.shutdown(2) #表示将来禁止读和写
 except OSError as msg:
  print("port %s is available !" %port)
  print(msg)
  return True
 else:
  print("port %s already in use! " %port)
  return False

if __name__ == '__main__':
 host = '127.0.0.1'
 prot = 4723
 check_port(host,prot)

netstat -aon | findstr "5037"

taskkill -f -pid 18028

# -*- coding: utf-8 -*-
"""
@ auth : carl_DJ
@ time : 2020-7-7
"""
import os

def release_port(port):
 "释放指定端口"

 #查找端口对应的pid
 cmd_find = 'netstat -ano | findstr %s' %port
 print(cmd_find)

 #返回命令执行结果
 result = os.popen(cmd_find).read()
 print(result)

 if str(port) and 'LISTENING' in result:
  #获取端口对应的pid进程
  i = result.index('LISTENING')
  # 'LISTENING'与端口号之间相隔7个空格
  start = i + len('LISTENING') +7
  end = result.index('\n')
  pid = result[start:end]

  #关闭被占用端口的pid
  cmd_kill = 'taskkill -f -pid %s' %pid
  print(cmd_kill)
  os.popen(cmd_kill)
 else:
  print('port %s is available !' %port)

if __name__ == '__main__':
 host = '127.0.0.1'
 port = 4723
 release_port(port)