

def get_used_space_in_data_centers(data_centers):
    used_by_accessories = RackAccessory.objects.filter(rack__server_room__data_center__in=data_centers).values_list('rack__server_room__data_center__name').annotate(s=Count('rack'))
    used_by_assets = DataCenterAsset.objects.filter(rack__server_room__data_center__in=data_centers, model__has_parent=False, rack__require_position=True).values_list('rack__server_room__data_center__name').annotate(s=Sum('model__height_of_device'))
    return (Counter(dict(used_by_assets)) + Counter(dict(data_centers)))

dataset/ETHPy150Open allegro/ralph/src/ralph/admin/templatetags/dashboard_tags.py get_used_space_in_data_centers/VarMisuse@88/181 `used_by_accessories`->`data_centers`