code: def output_disk(gandi, disk, datacenters, vms, profiles, output_keys,
                  justify=10):
      
      output_generic(gandi, disk, output_keys, justify)
  
      if 'kernel' in output_keys and disk.get('kernel_version'):
          output_line(gandi, 'kernel', disk['kernel_version'], justify)
  
      if 'cmdline' in output_keys and disk.get('kernel_cmdline'):
          output_cmdline(gandi, disk.get('kernel_cmdline'), justify)
  
      if 'dc' in output_keys:
          dc_name = None
          for dc in datacenters:
              if dc['id'] == disk['datacenter_id']:
                  dc_name = dc.get('dc_code', dc.get('iso', ''))
                  break
  
          if dc_name:
              output_line(gandi, 'datacenter', dc_name, justify)
  
      if 'vm' in output_keys:
          for vm_id in disk['vms_id']:
              vm_name = vms.get(vm_id, {}).get('hostname')
              if vm_name:
                  output_line(gandi, 'vm', vm_name, justify)
  
      if 'profile' in output_keys and disk.get('snapshot_profile'):
          output_line(gandi, 'profile', disk['snapshot_profile']['name'],
                      justify)
      elif 'profile' in output_keys and disk.get('snapshot_profile_id'):
          for profile in profiles:
              if profile['id'] == disk['snapshot_profile_id']:
                  output_line(gandi, 'profile', profile['name'], justify)
                  break
docs: Helper to output a disk.