return FileInfoVersions{}, err
		}
		versions, err = xlMeta.ListVersions(volume, path, allParts)
	}
	if err == nil && len(versions) == 0 {
		// This special case is needed to handle len(xlMeta.versions) == 0
		versions = []FileInfo{
			{
				Volume:   volume,
				Name:     path,
				Deleted:  true,
				IsLatest: true,
				ModTime:  timeSentinel1970,
			},
		}
	}
	if err != nil {

And then mount that under a path.

{* ../../docs_src/wsgi/tutorial001_py39.py hl[2:3,3] *}

## Check it { #check-it }

Now, every request under the path `/v1/` will be handled by the Flask application.

And the rest will be handled by **FastAPI**.

If you run it and go to <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a> you will see the response from Flask:

```txt

	if err != nil {
		return errInvalidArgument
	}
	data := &syscall.Win32finddata{}
	handle, err := syscall.FindFirstFile(globAllP, data)
	if err != nil {
		if err = syscallErrToFileErr(dirPath, err); err == errFileNotFound {
			return nil
		}
		return err
	}
	defer syscall.FindClose(handle)

	for ; ; err = syscall.FindNextFile(handle, data) {
		if err != nil {
			if err == syscall.ERROR_NO_MORE_FILES {
				break
			}

Routes are declared in a single place, using functions declared in other places (instead of using decorators that can be placed right on top of the function that handles the endpoint). This is closer to how Django does it than to how Flask (and Starlette) does it. It separates in the code things that are relatively tightly coupled.

/// check | Inspired **FastAPI** to

# OpenAPI

There are several utilities to handle OpenAPI.

// Code generated by "stringer -type=batchJobMetric -trimprefix=batchJobMetric batch-handlers.go"; DO NOT EDIT.

package cmd

import "strconv"

func _() {
	// An "invalid array index" compiler error signifies that the constant values have changed.
	// Re-run the stringer command to generate them again.
	var x [1]struct{}
	_ = x[batchJobMetricReplication-0]
	_ = x[batchJobMetricKeyRotation-1]
	_ = x[batchJobMetricExpire-2]
}

*   Updates `libjpeg-turbo` to `2.0.5` to handle
    [CVE-2020-13790](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13790).
*   Updates `junit` to `4.13.1` to handle
    [CVE-2020-15250](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15250).
*   Updates `PCRE` to `8.44` to handle
    [CVE-2019-20838](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20838)
    and

            int result = upgradeGoal.testExecuteWithTargetModel(context, "4.0.0");

            // The exact behavior depends on implementation, but it should handle gracefully
            // and not crash the entire upgrade process
            assertTrue(result >= 0, "Should handle .mvn creation failure gracefully");
        }
    }

    /**
     * Testable subclass that exposes protected methods for testing.
     */

  private final EventBus eventBus;
  private final Object event;
  private final Object subscriber;
  private final Method subscriberMethod;

  /**
   * @param eventBus The {@link EventBus} that handled the event and the subscriber. Useful for
   *     broadcasting a new event based on the error.
   * @param event The event object that caused the subscriber to throw.
   * @param subscriber The source subscriber context.

        context.warning("Test warning message");
        context.detail("Test detail message");
        context.action("Test action message");
    }

    @Test
    @DisplayName("should handle indentation correctly")
    void shouldHandleIndentationCorrectly() {
        UpgradeContext context = TestUtils.createMockContext(Paths.get("/test"));

        // Test indentation methods don't throw exceptions