def _parse_white_list_from_config(self, whitelists):
        """Parse and validate the pci whitelist from the nova config."""
        specs = []
        for jsonspec in whitelists:
            try:
                dev_spec = jsonutils.loads(jsonspec)
            except __HOLE__:
                raise exception.PciConfigInvalidWhitelist(
                          reason=_("Invalid entry: '%s'") % jsonspec)
            if isinstance(dev_spec, dict):
                dev_spec = [dev_spec]
            elif not isinstance(dev_spec, list):
                raise exception.PciConfigInvalidWhitelist(
                          reason=_("Invalid entry: '%s'; "
                                   "Expecting list or dict") % jsonspec)

            for ds in dev_spec:
                if not isinstance(ds, dict):
                    raise exception.PciConfigInvalidWhitelist(
                              reason=_("Invalid entry: '%s'; "
                                       "Expecting dict") % ds)

                spec = devspec.PciDeviceSpec(ds)
                specs.append(spec)

        return specs
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/pci/whitelist.py/Whitelist._parse_white_list_from_config