code: def get_scheduler_from_hostname(self, host_name):
          
          scheduler_uuid = self.hosts_schedulers.get(host_name, None)
          return self.schedulers.get(scheduler_uuid, None)
docs: Get scheduler linked to the given host_name
  
          :param host_name: host_name we want the scheduler from
          :type host_name: str
          :return: scheduler with id corresponding to the mapping table
          :rtype: dict