Então, as colocamos em seu próprio módulo de `dependencies` (`app/dependencies.py`).

Agora usaremos uma dependência simples para ler um cabeçalho `X-Token` personalizado:

{* ../../docs_src/bigger_applications/app_an_py39/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | Dica

Estamos usando um cabeçalho inventado para simplificar este exemplo.

    /**
     * Resolves the transitive dependencies of the specified project.
     *
     * @param project         The project whose dependencies should be resolved, must not be {@code null}.
     * @param scopesToResolve The dependency scopes that should be resolved, may be {@code null}.
     * @param session         The current build session, must not be {@code null}.

Así que las ponemos en su propio módulo `dependencies` (`app/dependencies.py`).

Ahora utilizaremos una dependencia simple para leer un header `X-Token` personalizado:

{* ../../docs_src/bigger_applications/app_an_py39/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | Consejo

Estamos usando un header inventado para simplificar este ejemplo.

                        .append(">\n");
            }
            xml.append("    </properties>\n");
        }

        if (!dependencies.isEmpty()) {
            xml.append("    <dependencies>\n");
            for (Dependency dependency : dependencies) {
                xml.append("        <dependency>\n");
                xml.append("            <groupId>").append(dependency.groupId).append("</groupId>\n");

  <organization>
    <name>Codehaus</name>
  </organization>

  <dependencyManagement>

    <dependencies>

      <dependency>
        <groupId>maven</groupId>
        <artifactId>p1</artifactId>
        <version>1.0</version>
        <scope>test</scope>
      </dependency>

    </dependencies>

  </dependencyManagement>

  <packaging>jar</packaging>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>snapshot-test</groupId>
      <artifactId>maven-snapshot-a</artifactId>
      <version>1.0-SNAPSHOT</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>

      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t04-b</artifactId>
      <version>2.0</version>
    </dependency>
  </dependencies>

    <syntax>project.artifacts</syntax>
    <configuration>
      <![CDATA[
<dependencies>
  ...
</dependencies>
    ]]></configuration>
    <description>
      <![CDATA[
      This is a set of Artifact instances resolved from the set of dependencies for
      the current project.

      NOTE: This will likely contain much more than the direct dependencies of the

      <url>file://dummy</url>
    </repository>
  </repositories>

  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t09-b</artifactId>
      <version>1.0</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

      <url>file://dummy</url>
    </repository>
  </repositories>

  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t10-b</artifactId>
      <version>1.0</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>