'Internal'

def send_request(self, error_no_hosts=True):

    for host in self.query_plan:
        req_id = self._query(host)
        if (req_id is not None):
            self._req_id = req_id
            return True
        if ((self.timeout is not None) and ((time.time() - self._start_time) > self.timeout)):
            self._on_timeout()
            return True
    if error_no_hosts:
        self._set_final_exception(NoHostAvailable('Unable    to    complete    the    operation    against    any    hosts', self._errors))
    return False
