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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools" package="okhttp.android.test">

  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

  <application android:usesCleartextTraffic="true" tools:targetApi="m"/>

        }

        return new byte[bufferSize];
    }

    static void getBuffers(final SmbComTransaction req, final SmbComTransactionResponse rsp) {
        req.txn_buf = getBuffer();
        rsp.txn_buf = getBuffer();
    }

    /**
     * Returns a buffer to the cache for reuse.
     *
     * Performance: O(1) operation with size limit check
     *

	// part number.
	res, err := objLayer.NewMultipartUpload(ctx, bucket, object, opts)
	if err != nil {
		t.Fatalf("Failed to create a multipart upload - %v", err)
	}

	var uploadedParts []CompletePart
	for _, partID := range []int{2, 1} {

	for _, user := range users {
		if user.ID == 0 {
			t.Fatalf("user's primary key should has value after create, got : %v", user.ID)
		}
	}

	if res := DB.Delete(&users[1]); res.Error != nil || res.RowsAffected != 1 {
		t.Errorf("errors happened when delete: %v, affected: %v", res.Error, res.RowsAffected)
	}

	var result User
	if err := DB.Where("id = ?", users[1].ID).First(&result).Error; err == nil || !errors.Is(err, gorm.ErrRecordNotFound) {

 */
package org.codelibs.fess.app.web.api.admin.dict.mapping;

import org.codelibs.fess.app.web.admin.dict.mapping.CreateForm;

/**
 * Request body for creating mapping dictionary via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.group;

import org.codelibs.fess.app.web.admin.group.CreateForm;

/**
 * Request body for creating group via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {

 */
package org.codelibs.fess.app.web.api.admin.accesstoken;

import org.codelibs.fess.app.web.admin.accesstoken.CreateForm;

/**
 * Request body for creating access token via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {

 */
package org.codelibs.fess.app.web.api.admin.keymatch;

import org.codelibs.fess.app.web.admin.keymatch.CreateForm;

/**
 * Request body for creating key match via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {

 */
package org.codelibs.fess.app.web.api.admin.relatedcontent;

import org.codelibs.fess.app.web.admin.relatedcontent.CreateForm;

/**
 * Request body for creating related content via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */
    public CreateBody() {