It takes a single "dependable" callable (like a function).

    Don't call it directly, FastAPI will call it for you.

    Read more about it in the
    [FastAPI docs for Dependencies](https://fastapi.tiangolo.com/tutorial/dependencies/).

    **Example**

    ```python
    from typing import Annotated

    from fastapi import Depends, FastAPI

    app = FastAPI()

For gradual adoption, enable checks project-by-project.
Do not rely on `@NullMarked` annotations.
Only enable checks for a project if all its dependencies have checks enabled, in order to avoid back-and-forth when refining the annotations.

        "jnr.constants.platform.linux.Signal",
        "jnr.constants.platform.solaris.Signal",
        "jnr.constants.Constant",
        "jnr.constants.ConstantResolver",
    ),
)
plugins.withId("java-base") {
    dependencies {
        attributesSchema {
            attribute(minified)
        }
        // It would be nice if we could be more selective about which variants to apply this to.

                                        val dependencyDetails = classes[name]
                                        if (dependencyDetails !== details) {
                                            details.dependencies.add(dependencyDetails)
                                        }
                                        return dependencyDetails.outputClassName
                                    }
                                }

    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-core</artifactId>

  <name>Maven 4 Core</name>
  <description>Maven Core classes.</description>

  <dependencies>
    <!--  Maven4 API -->
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-annotations</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>

    keep all of your OkHttp artifacts on the same version, even if they're declared via transitive
    dependencies. You can even omit versions when declaring other OkHttp dependencies.

    ```kotlin
    dependencies {
       api(platform("com.squareup.okhttp3:okhttp-bom:4.4.0"))
       api("com.squareup.okhttp3:okhttp")              // No version!

This is a simple guide to get you started and teach you how everything works **underneath**.

There are many **alternatives** to managing virtual environments, package dependencies (requirements), projects.

Once you are ready and want to use a tool to **manage the entire project**, packages dependencies, virtual environments, etc. I would suggest you try <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">uv</a>.

## Abhängigkeiten { #dependencies }

FastAPI hängt von Pydantic und Starlette ab.

### `standard`-Abhängigkeiten { #standard-dependencies }

Wenn Sie FastAPI mit `pip install "fastapi[standard]"` installieren, kommt es mit der `standard`-Gruppe optionaler Abhängigkeiten:

Verwendet von Pydantic:

Create a utility function to generate a new access token.

{* ../../docs_src/security/tutorial004_an_py310.py hl[4,7,13:15,29:31,79:87] *}

## Update the dependencies { #update-the-dependencies }

Update `get_current_user` to receive the same token as before, but this time, using JWT tokens.

Decode the received token, verify it, and return the current user.

        List<Dependency> deps = result.getDependencies();
        assertEquals(2, deps.size());
        checkUtSimpleArtifactDependencies(deps.get(0), deps.get(1));
    }

    /**
     * check ut.simple:artifact:1.0 dependencies
     */
    private void checkUtSimpleArtifactDependencies(Dependency dep1, Dependency dep2) {
        assertEquals("compile", dep1.getScope());