///

### Create a callback `APIRouter` { #create-a-callback-apirouter }

First create a new `APIRouter` that will contain one or more callbacks.

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### Create the callback *path operation* { #create-the-callback-path-operation }

To create the callback *path operation* use the same `APIRouter` you created above.

                s3Client.createBucket(createRequest);
                logger.info("Created storage bucket: {}", bucket);
            } catch (final Exception e1) {
                logger.warn("Failed to create storage bucket: {}", bucket, e1);
            }
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {

  /**
   * Creates a new, empty {@code ConcurrentHashMultiset} using the default initial capacity, load
   * factor, and concurrency settings.
   */
  public static <E> ConcurrentHashMultiset<E> create() {
    return create(new ConcurrentHashMap<>());
  }

  /**
   * Creates a new {@code ConcurrentHashMultiset} containing the specified elements, using the

    }

    /**
     * Internal method to create crawling configuration based on form data.
     * Determines whether to create a web or file crawler configuration.
     *
     * @param form the form containing crawling configuration data
     * @return the name of the created configuration
     */
    protected String crawlingConfigInternal(final CrawlingConfigForm form) {

public final class LinkedHashMultiset<E extends @Nullable Object>
    extends AbstractMapBasedMultiset<E> {

  /** Creates a new, empty {@code LinkedHashMultiset} using the default initial capacity. */
  public static <E extends @Nullable Object> LinkedHashMultiset<E> create() {
    return new LinkedHashMultiset<>();
  }

  /**
   * Creates a new, empty {@code LinkedHashMultiset} with the specified expected number of distinct
   * elements.
   *

labels.handler_name=Handler Name
labels.handler_parameter=Parameters
labels.handler_script=Script
labels.data_crawling_button_create=Create
labels.data_crawling_button_create_job=Create New Job
labels.wizard_title_configuration=Configuration Wizard
labels.wizard_start_title=Easy Setup
labels.wizard_start_desc=You can create a crawl setting easily by using Configuration Wizard.
labels.wizard_start_button=Start Setup
labels.wizard_button_cancel=Cancel

 *
 * <p>One path type is handled in a special way: unlike other options,
 * the paths specified in a {@code --patch-module} Java option is effective only for a specified module.
 * This type is created by calls to {@link #patchModule(String)} and a new instance must be created for
 * every module to patch.</p>
 *
 * <p>Path types are often exclusive. For example, a dependency should not be both on the Java class path
 * and on the Java module path.</p>
 *

    contents = f.read()
    print(contents)
```

Underneath, the `open("./somefile.txt")` creates an object that is called a "Context Manager".

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

When you create a dependency with `yield`, **FastAPI** will internally create a context manager for it, and combine it with some other related tools.

///

## Create a Project { #create-a-project }

First, create a directory for your project.

What I normally do is that I create a directory named `code` inside my home/user directory.

And inside of that I create one directory per project.

<div class="termy">

```console
// Go to the home directory
$ cd
// Create a directory for all your code projects
$ mkdir code

labels.handler_name=Handler Name
labels.handler_parameter=Parameters
labels.handler_script=Script
labels.data_crawling_button_create=Create
labels.data_crawling_button_create_job=Create New Job
labels.wizard_title_configuration=Configuration Wizard
labels.wizard_start_title=Easy Setup
labels.wizard_start_desc=You can create a crawl setting easily by using Configuration Wizard.
labels.wizard_start_button=Start Setup
labels.wizard_button_cancel=Cancel