This is incredibly helpful while developing and debugging code that interacts with your API.

## Documentation

And when you open your browser at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>, you will see an automatic, interactive, API documentation like:

<img src="/img/tutorial/path-params/image01.png">

!!! check

And those Python files are included/injected in the documentation when generating the site.

### Docs for tests

Most of the tests actually run against the example source files in the documentation.

This helps to make sure that:

* The documentation is up-to-date.
* The documentation examples can be run as is.
* Most of the features are covered by the documentation, ensured by test coverage.

public abstract class ReleaseNotes {
    /**
     * The source markdown file for the release notes.
     */
    public abstract RegularFileProperty getMarkdownFile();

    /**
     * The base CSS file used by all documentation.
     */
    public abstract RegularFileProperty getBaseCssFile();

    /**
     * The release notes specific CSS file
     */
    public abstract RegularFileProperty getReleaseNotesCssFile();

    /**

                    throw new ExpressionDocumentationException(
                            "Failed to read documentation for expression root: " + root, e);
                } catch (XmlPullParserException e) {
                    throw new ExpressionDocumentationException(
                            "Failed to parse documentation for expression root: " + root, e);
                }
            }
        }

      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,
      and conversions to other media types.

  Maven is a software project management and comprehension tool. Based on
  the concept of a Project Object Model (POM), Maven can manage a project's
  build, reporting and documentation from a central piece of information.

  Documentation
  -------------

  The most up-to-date documentation can be found at https://maven.apache.org/.

  Release Notes
  -------------

## Documentation Tags - OpenAPI

To add tags to your *path operations*, and group them in the docs UI, read the docs for [Tutorial - Path Operation Configurations - Tags](../tutorial/path-operation-configuration.md#tags){.internal-link target=_blank}.

## Documentation Summary and Description - OpenAPI

        tasks.register("serveDocs", ServeDocs.class, task -> {
            task.setDescription("Runs a local webserver to serve generated documentation.");
            task.setGroup("documentation");

            int webserverPort = 8000;
            task.getJavaLauncher().set(
                task.getProject().getExtensions().getByType(JavaToolchainService.class)

    vcsRootId = gradlePromotionBranches
) {
    init {
        id("Promotion_NightlyDocumentation")
        name = "Nightly Documentation"
        description = "Promotes the latest successful documentation changes on '${branch.branchName}' from Ready for Nightly as a new nightly documentation snapshot"

        triggers {
            branch.nightlyPromotionTriggerHour?.let { triggerHour ->
                schedule {

		statusCode: 400,
		cause:      err,
	}
}

func errInvalidScanRangeParameter(err error) *s3Error {
	return &s3Error{
		code:       "InvalidRequestParameter",
		message:    "The value of a parameter in ScanRange element is invalid. Check the service API documentation and try again.",
		statusCode: 400,
		cause:      err,
	}