利用python自带的socket，检测端口是否被占用

import socket

def check_port(host,port):
    s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    try:
        s.connect((host,port))
        # 关闭端口，2的意思是：将来禁止读和写
        s.shutdown(2)
    except OSError as msg:
        print('port%s is available!'% port)
        print(msg)
        return True
    else:
        print('port %s alreadt be inuse!'%port)
        return False


if __name__ == '__main__':
    host='127.0.0.1'
    port=4237
    check_port(host,port)