def _check_port(host, port, socket_type):
        """
        Check if an a port is available and raise an OSError if port is not available

        :returns: boolean
        """
        if socket_type == "UDP":
            socket_type = socket.SOCK_DGRAM
        else:
            socket_type = socket.SOCK_STREAM

        for res in socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket_type, 0, socket.AI_PASSIVE):
            af, socktype, proto, _, sa = res
            with socket.socket(af, socktype, proto) as s:
                s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
                s.bind(sa)  # the port is available if bind is a success
            return True
Check if an a port is available and raise an OSError if port is not available

        :returns: boolean