Create a file `main.py` with:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">

#include "tensorflow/core/platform/thread_annotations.h"
#include "tensorflow/core/platform/types.h"
#include "tensorflow/core/public/release_version.h"
#include "tensorflow/core/public/session.h"

// The implementation below is at the top level instead of the
// brain namespace because we are defining 'extern "C"' functions.
using tensorflow::AttrValueMap;
using tensorflow::DataType;
using tensorflow::ExtendSessionGraphHelper;

- Allow to monitor client-go DNS resolver latencies via `rest_client_dns_resolution_duration_seconds` Prometheus metric. ([#115357](https://github.com/kubernetes/kubernetes/pull/115357), [@mfojtik](https://github.com/mfojtik))

* CSI detach timeout increased from 10 seconds to 2 minutes ([#84321](https://github.com/kubernetes/kubernetes/pull/84321), [@cduchesne](https://github.com/cduchesne))
* Switched intstr.Type to sized integer to follow API guidelines and improve compatibility with proto libraries ([#83956](https://github.com/kubernetes/kubernetes/pull/83956), [@liggitt](https://github.com/liggitt))

   * href="http://en.wikipedia.org/wiki/Lexicographical_order">lexicographically</a>. That is, it
   * compares, using {@link #compare(double, double)}), the first pair of values that follow any
   * common prefix, or when one array is a prefix of the other, treats the shorter array as the
   * lesser. For example, {@code [] < [1.0] < [1.0, 2.0] < [2.0]}.
   *

				if len(dversions) > len(versions) {
					versions = dversions
				}
				break
			}
		}
		dataDir = reduceCommonDataDir(dataDirs, writeQuorum)
	}

	// We can safely allow RenameData errors up to len(er.getDisks()) - writeQuorum
	// otherwise return failure.
	return evalDisks(disks, errs), versions, dataDir, err
}

	}

	for _, columnType := range columnTypes {
		switch columnType.Name() {
		case "bonus":
			// allow to change non-nullable to nullable
			if nullable, _ := columnType.Nullable(); !nullable {
				t.Fatalf("bonus's nullable should be true, bug got %t", nullable)
			}
		case "stock":
			// do not allow to change nullable to non-nullable
			if nullable, _ := columnType.Nullable(); !nullable {

    /**
     * Internal search method that executes the actual search query.
     *
     * This method performs the search using the rank fusion processor and may retry
     * with OR operator if the hit count is below the configured minimum threshold.
     *
     * @param query The search query string
     * @param params The search request parameters
     * @param userBean Optional user information for permission checking

       * thanks to @GuardedBy above. (cancellationDelegate.lock is initialized to this.lock in the
       * call to `new SupplantableFuture` below.)
       */
      @SuppressWarnings("GuardedBy")
      private Cancellable initializeOrUpdateCancellationDelegate(Schedule schedule) {
        if (cancellationDelegate == null) {

Cuando ejecutas **múltiples procesos** del mismo programa de API, comúnmente se les llama **workers**.

### Worker Processes y Puertos