docs: def _pci_seq(ipmicmd):
      """Get output of ipmiraw command and the ordinal numbers.
  
      :param ipmicmd: IPMI command object.
      :returns: List of tuple contain ordinal number and output of ipmiraw
      command.
      """
      for i in range(1, 0xff + 1):
          try:
              res = _send_raw_command(ipmicmd, GET_PCI % hex(i))
              yield i, res
          except ipmi_exception.IpmiException as e:
              raise IPMIFailure(
                  "IPMI operation '%(operation)s' failed: %(error)s" %
                  {'operation': "GET PCI device quantity", 'error': e})