from fastapi import Depends


async def dependency_a():
    dep_a = generate_dep_a()
    try:
        yield dep_a
    finally:
        dep_a.close()


async def dependency_b(dep_a=Depends(dependency_a)):
    dep_b = generate_dep_b()
    try:
        yield dep_b
    finally:
        dep_b.close(dep_a)


async def dependency_c(dep_b=Depends(dependency_b)):
    dep_c = generate_dep_c()
    try:
        yield dep_c

Por ejemplo, `dependency_c` puede tener una dependencia de `dependency_b`, y `dependency_b` de `dependency_a`:

{* ../../docs_src/dependencies/tutorial008_an_py39.py hl[6,14,22] *}

Y todas ellas pueden usar `yield`.

En este caso, `dependency_c`, para ejecutar su código de salida, necesita que el valor de `dependency_b` (aquí llamado `dep_b`) todavía esté disponible.

Например, `dependency_c` может зависеть от `dependency_b`, а `dependency_b` — от `dependency_a`:

{* ../../docs_src/dependencies/tutorial008_an_py39.py hl[6,14,22] *}

И все они могут использовать `yield`.

В этом случае `dependency_c` для выполнения своего кода выхода нуждается в том, чтобы значение из `dependency_b` (здесь `dep_b`) всё ещё было доступно.

**FastAPI** will make sure that the "exit code" in each dependency with `yield` is run in the correct order.

For example, `dependency_c` can have a dependency on `dependency_b`, and `dependency_b` on `dependency_a`:

{* ../../docs_src/dependencies/tutorial008_an_py39.py hl[6,14,22] *}

And all of them can use `yield`.

In this case `dependency_c`, to execute its exit code, needs the value from `dependency_b` (here named `dep_b`) to still be available.

Beispielsweise kann `dependency_c` von `dependency_b` und `dependency_b` von `dependency_a` abhängen:

{* ../../docs_src/dependencies/tutorial008_an_py39.py hl[6,14,22] *}

Und alle können `yield` verwenden.

In diesem Fall benötigt `dependency_c` zum Ausführen seines Exit-Codes, dass der Wert von `dependency_b` (hier `dep_b` genannt) verfügbar ist.

Por exemplo, `dependency_c` pode depender de `dependency_b`, e `dependency_b` depender de `dependency_a`:

{* ../../docs_src/dependencies/tutorial008_an_py39.py hl[6,14,22] *}

E todas elas podem utilizar `yield`.

Neste caso, `dependency_c`, para executar seu código de saída, precisa que o valor de `dependency_b` (nomeado de `dep_b` aqui) continue disponível.

        Element dependency = dependencies.child("dependency").orElse(null);
        assertNotNull(dependency, "dependency should exist");

        // Insert elements in dependency according to dependency ordering
        DomUtils.insertContentElement(dependency, "scope", "test");
        DomUtils.insertContentElement(dependency, "type", "jar");

        String xmlOutput = DomUtils.toXml(doc);

        /**
         * Adds the specified direct dependency.
         *
         * @param dependency the dependency to add, may be {@code null}
         * @return this request for chaining, never {@code null}
         */
        @Nonnull
        public DependencyResolverRequestBuilder dependency(@Nullable DependencyCoordinates dependency) {
            if (dependency != null) {
                if (this.dependencies.isEmpty()) {

			<version>${commons.io.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>${commons.lang3.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-text</artifactId>
			<version>${commons.text.version}</version>
		</dependency>
		<dependency>
			<groupId>commons-net</groupId>

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-di</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-settings</artifactId>
    </dependency>
    <dependency>