### Dependency injection

FastAPI'ın inanılmaz derecede kullanımı kolay, fakat inanılmaz derecede güçlü <abbr title='"components", "resources", "services", "providers" olarak da bilinen'><strong>Dependency Injection </strong></abbr> sistemi var.

* Dependencylerin bile dependencies'i olabiliyor, FastAPI bunun  için **graph of "dependency"** yaratıyor.

### Einbringen von Abhängigkeiten (Dependency Injection)

FastAPI enthält ein extrem einfach zu verwendendes, aber extrem mächtiges <abbr title='Dependency Injection – Einbringen von Abhängigkeiten: Auch bekannt als Komponenten, Resourcen, Dienste, Dienstanbieter'><strong>Dependency Injection</strong></abbr> System.

### Dependency Injection { #dependency-injection }

FastAPI includes an extremely easy to use, but extremely powerful <abbr title='also known as "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></abbr> system.

      uses: actions/setup-python@v5
      with:
        python-version: "3.11"
    - name: Setup uv
      uses: astral-sh/setup-uv@v6
      with:
        version: "0.4.15"
        enable-cache: true
        cache-dependency-glob: |
            requirements**.txt
            pyproject.toml
    - name: Install GitHub Actions dependencies
      run: uv pip install -r requirements-github-actions.txt
    - name: Label Approved

        with:
          python-version: "3.11"
      - name: Setup uv
        uses: astral-sh/setup-uv@v6
        with:
          version: "0.4.15"
          enable-cache: true
          cache-dependency-glob: |
            requirements**.txt
            pyproject.toml
      - name: Install GitHub Actions dependencies
        run: uv pip install -r requirements-github-actions.txt
      - name: Update Topic Repos

        this.remoteRepositories = remoteRepositories;

        return this;
    }

    /**
     * Gets the artifact filter that controls traversal of the dependency graph.
     *
     * @return The filter used to determine which of the artifacts in the dependency graph should be traversed or
     *         {@code null} to collect all transitive dependencies.
     */
    public ArtifactFilter getCollectionFilter() {

## Simple HTTP Basic Auth { #simple-http-basic-auth }

* Import `HTTPBasic` and `HTTPBasicCredentials`.
* Create a "`security` scheme" using `HTTPBasic`.
* Use that `security` with a dependency in your *path operation*.
* It returns an object of type `HTTPBasicCredentials`:
    * It contains the `username` and `password` sent.

{* ../../docs_src/security/tutorial006_an_py39.py hl[4,8,12] *}

Usar `BackgroundTasks` también funciona con el sistema de inyección de dependencias, puedes declarar un parámetro de tipo `BackgroundTasks` en varios niveles: en una *path operation function*, en una dependencia (dependable), en una sub-dependencia, etc.

**FastAPI** sabe qué hacer en cada caso y cómo reutilizar el mismo objeto, de modo que todas las tareas en segundo plano se combinan y ejecutan en segundo plano después:

 * which provides functionality for upgrading Maven projects and dependencies.</p>
 *
 * <p>Key features include:</p>
 * <ul>
 *   <li>Project upgrade capabilities</li>
 *   <li>Dependency version management</li>
 *   <li>Configuration migration</li>
 *   <li>Interactive upgrade workflows</li>
 * </ul>
 *
 * @see org.apache.maven.api.cli.Tools#MVNUP_CMD
 * @see org.apache.maven.api.cli.Tools#MVNUP_NAME

 */
package org.apache.maven.api;

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

/**
 * A version or meta-version of an artifact or a dependency.
 * A meta-version is a version suffixed with the {@code SNAPSHOT} keyword.
 * Versions are usually parsed using the {@link org.apache.maven.api.services.VersionParser} service.
 *
 * @since 4.0.0