return null;
            }).filter(file -> file != null).toArray(n -> new DictionaryFile<?>[n]);
        } catch (final IOException e) {
            throw new DictionaryException("Failed to access dictionaries", e);
        }
    }

    public OptionalEntity<DictionaryFile<? extends DictionaryItem>> getDictionaryFile(final String id) {
        for (final DictionaryFile<? extends DictionaryItem> dictFile : getDictionaryFiles()) {

9. This *path operation function* is not returning dataclasses (although it could), but a list of dictionaries with internal data.

    FastAPI will use the `response_model` parameter (that includes dataclasses) to convert the response.

labels.joblog_delete_all_confirmation=Do you really want to delete all?
labels.joblog_delete_all_cancel=Cancel
labels.dict_configuration=Dictionary List
labels.dict_list_title=Dictionary List
labels.dict_list_link=Dictionaries
labels.dictionary_name=Name
labels.dictionary_type=Type
labels.dict_synonym_configuration=Synonym List
labels.dict_synonym_title=Synonym List
labels.dict_synonym_list_link=List

			 "cluster.initial_cluster_manager_nodes":"search_engine",
			 "node.roles":"cluster_manager,data,ingest,ml",
			 -->
			 "indices.breaker.total.limit":"100%",
			 "action.auto_create_index":"-*"}
		</property>
		<!-- Dictionaries -->
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"mapping.txt"</arg>
		</postConstruct>
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"synonym.txt"</arg>

labels.joblog_delete_all_confirmation=Do you really want to delete all?
labels.joblog_delete_all_cancel=Cancel
labels.dict_configuration=Dictionary List
labels.dict_list_title=Dictionary List
labels.dict_list_link=Dictionaries
labels.dictionary_name=Name
labels.dictionary_type=Type
labels.dict_synonym_configuration=Synonym List
labels.dict_synonym_title=Synonym List
labels.dict_synonym_list_link=List

You can use **type annotations** the same way you would for input data in function **parameters**, you can use Pydantic models, lists, dictionaries, scalar values like integers, booleans, etc.

//// tab | Python 3.10+

```Python hl_lines="16  21"
{!> ../../docs_src/response_model/tutorial001_01_py310.py!}
```

////

//// tab | Python 3.9+

labels.storage_access_key=Access Key
labels.storage_secret_key=Secret Key
labels.storage_bucket=Bucket
labels.upgrade_reindex=Reindex
labels.replace_aliases=Update Aliases
labels.reset_dictionaries=Reset Dictionaries
labels.reindex_start_button=Start
labels.doc_score=Score:
labels.development_mode_warning=Running as Development mode. For production use, please install a standalone OpenSearch server.

labels.storage_access_key=Access Key
labels.storage_secret_key=Secret Key
labels.storage_bucket=Bucket
labels.upgrade_reindex=Reindex
labels.replace_aliases=Update Aliases
labels.reset_dictionaries=Reset Dictionaries
labels.reindex_start_button=Start
labels.doc_score=Score:
labels.development_mode_warning=Running as Development mode. For production use, please install a standalone OpenSearch server.

    /** The key of the message: Dictionary List */
    public static final String LABELS_dict_list_title = "{labels.dict_list_title}";

    /** The key of the message: Dictionaries */
    public static final String LABELS_dict_list_link = "{labels.dict_list_link}";

    /** The key of the message: Name */
    public static final String LABELS_dictionary_name = "{labels.dictionary_name}";

9. Esta *função de operação de rota* não está retornando dataclasses (embora pudesse), mas uma lista de dicionários com dados internos.

    O FastAPI usará o parâmetro `response_model` (que inclui dataclasses) para converter a resposta.