**FastAPI** bietet ein praktisches Werkzeug zur Strukturierung Ihrer Anwendung bei gleichzeitiger Wahrung der Flexibilität.

/// info

Wenn Sie von Flask kommen, wäre dies das Äquivalent zu Flasks Blueprints.

///

## Eine Beispiel-Dateistruktur

Nehmen wir an, Sie haben eine Dateistruktur wie diese:

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   ├── dependencies.py

`Optional[EenType]` is eigenlijk een snelkoppeling voor `Union[EenType, None]`, ze zijn equivalent.

Dit betekent ook dat je in Python 3.10 `EenType | None` kunt gebruiken:

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

Ainda assim, a experiência final não foi a melhor. 😞

---

Essa seria o equivalente paralelo à histório dos hambúrgueres. 🍔

Para um exemplo "mais real", imagine um banco.

Até recentemente, a maioria dos bancos tinham muitos caixas 👨‍💼👨‍💼👨‍💼👨‍💼 e uma grande fila 🕙🕙🕙🕙🕙🕙🕙🕙.

   * multiple multisets in series.
   *
   * @since 12.0
   */
  public static class Builder<E> extends ImmutableMultiset.Builder<E> {
    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link
     * ImmutableSortedMultiset#orderedBy(Comparator)}.
     */
    public Builder(Comparator<? super E> comparator) {
      super(TreeMultiset.<E>create(checkNotNull(comparator)));

### Memória do servidor

            fromIterator.remove();
          }
        };
  }

  /**
   * Returns the reversed view of this converter, which converts {@code this.convert(a)} back to a
   * value roughly equivalent to {@code a}.
   *
   * <p>The returned converter is serializable if {@code this} converter is.
   *
   * <p><b>Note:</b> you should not override this method. It is non-final for legacy reasons.
   */

La forma en que lo usas es muy sencilla. Por ejemplo, para hacer un `GET` request, escribirías:

```Python
response = requests.get("http://example.com/some/url")
```

La operación de path equivalente en FastAPI podría verse como:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():
    return {"message": "Hello World"}
```

Mira las similitudes entre `requests.get(...)` y `@app.get(...)`.

But still, the final experience is not the best. 😞

---

This would be the parallel equivalent story for burgers. 🍔

For a more "real life" example of this, imagine a bank.

Up to recently, most of the banks had multiple cashiers 👨‍💼👨‍💼👨‍💼👨‍💼 and a big line 🕙🕙🕙🕙🕙🕙🕙🕙.

  // element of the list has the short hash value h.
  //
  // A wrinkle here is that the value 0 (called UNSET in the code) is used as the equivalent of a
  // null pointer. If `table[h] == 0` that means there are no keys in the map whose short hash is h.
  // If the `next` bits in `entries[i]` are 0 that means there are no further entries for the given

Et pourtant l'expérience finale n'est pas meilleure 😞.

---

C'est donc l'histoire équivalente parallèle pour les burgers 🍔.

Pour un exemple plus courant dans la "vie réelle", imaginez une banque.