{* ../../docs_src/background_tasks/tutorial001_py39.py hl[1,13] *}

**FastAPI** erstellt für Sie das Objekt vom Typ `BackgroundTasks` und übergibt es als diesen Parameter.

## Eine Taskfunktion erstellen { #create-a-task-function }

Erstellen Sie eine Funktion, die als Hintergrundtask ausgeführt werden soll.

// also carries a special empty sub-system which dumps
// help for each sub-system key.
var HelpSubSysMap = map[string]HelpKVS{}

// RegisterHelpSubSys - this function saves
// input help KVS for each sub-system globally,
// this function should be called only once
// preferably in during `init()`.
func RegisterHelpSubSys(helpKVSMap map[string]HelpKVS) {
	maps.Copy(HelpSubSysMap, helpKVSMap)
}

///

## Andere asynchrone Funktionsaufrufe { #other-asynchronous-function-calls }

     * Converts validation messages to a localized string representation for API responses.
     * Uses the request locale if available, otherwise defaults to English.
     *
     * @param validationMessagesLambda lambda function that adds validation messages
     * @return concatenated string of localized validation messages separated by spaces
     */
    protected String getMessage(final VaMessenger<FessMessages> validationMessagesLambda) {

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api;

import java.util.List;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Stream;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Immutable;
import org.apache.maven.api.annotations.Nonnull;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Consumer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.lang.ThreadUtil;
import org.codelibs.core.misc.Pair;

        localCertificates.toImmutableList(),
      ) { peerCertificatesCopy }
    }

    @Throws(IOException::class)
    @JvmName("-deprecated_get")
    @Deprecated(
      message = "moved to extension function",
      replaceWith = ReplaceWith(expression = "sslSession.handshake()"),
      level = DeprecationLevel.ERROR,
    )
    fun get(sslSession: SSLSession) = sslSession.handshake()

    @JvmStatic
    fun get(

import javax.inject.Named;

import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.function.Consumer;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;
import org.slf4j.Logger;

	columnNames  []string
	csvRecord    []string
	nameIndexMap map[string]int64
}

// Get - gets the value for a column name. CSV fields do not have any
// defined type (other than the default string). So this function
// always returns fields using sql.FromBytes so that the type
// specified/implied by the query can be used, or can be automatically
// converted based on the query.
func (r *Record) Get(name string) (*sql.Value, error) {

### Dependências com `yield` e `scope` { #dependencies-with-yield-and-scope }

Na versão 0.121.0, o FastAPI adicionou suporte a `Depends(scope="function")` para dependências com `yield`.

Usando `Depends(scope="function")`, o código de saída após o `yield` é executado logo depois que a *função de operação de rota* termina, antes de a response ser enviada de volta ao cliente.