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foreach (@$Datacenter_views)
{
...
    }
    exit();
}

my $Cluster_views = Vim::find_entity_views(view_type => 'ClusterCo
+mputeResource', begin_entity => $DC_view);

        my $Cluster_view = Vim::find_entity_view(view_type => 'Cluster
+ComputeResource',  filter => { name => $cluster->name });
        my $Hosts_view = Vim::find_entity_views(view_type => 'HostSyst
+em', begin_entity => $Cluster_view);

    my $hosts_views = Vim::find_entity_views(view_type => 'HostSystem'
+, begin_entity => $DC_view);

Data Centre, Cluster, Host (only if the host is in a cluster)
Data centre, Host (only if the host not in a data centre)

   foreach my $hosts (@$hosts_views)
    {
...
    }
}