O **FastAPI** é baseado nesses type hints, eles oferecem muitas vantagens e benefícios.

Mas mesmo que você nunca use o **FastAPI**, você se beneficiaria de aprender um pouco sobre eles.

/// note | Nota

Se você é um especialista em Python e já sabe tudo sobre type hints, pule para o próximo capítulo.

///

## Motivação

Vamos começar com um exemplo simples:

```Python

```

O zaman *path operasyon fonksiyonunu* `async def` ile tanımlayın örneğin:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

/// note | "Not"

Sadece `async def` ile tanımlanan fonksiyonlar içinde `await` kullanabilirsiniz.

///

---

        static_cast<const float*>(TF_TensorData(resolved));
    EXPECT_EQ(0, memcmp(m_float, resolved_data, 4 * sizeof(float)));
    TF_DeleteTensor(resolved);
    TFE_DeleteTensorHandle(copy_aliased);  // Note that this will delete copy.
    TFE_DeleteTensorHandle(on_host);
  }
  TF_DeleteDeviceList(devices);
  TF_DeleteTensor(m_data);
  TFE_DeleteTensorHandle(m);
  TFE_DeleteContext(ctx);
  TF_DeleteStatus(status);

	dashboardCmd.AddCommand(skywalking)

	envoy := envoyDashCmd(cliContext)
	envoy.Long += fmt.Sprintf("\n\n%s\n", "Note: envoy command is deprecated and can be replaced with proxy command, "+
		"e.g. `istioctl dashboard proxy --help`")
	envoy.PersistentFlags().StringVarP(&labelSelector, "selector", "l", "", "Label selector")

	_, policy := sys.store.MergePolicies(strings.Join(policies, ","))
	return policy
}

// doesPolicyAllow - checks if the given policy allows the passed action with given args. This is rarely needed.
// Notice there is no account name involved, so this is a dangerous function.
func (sys *IAMSys) doesPolicyAllow(policy string, args policy.Args) bool {
	// Policies were found, evaluate all of them.

     * an I/O error, or if the target entry is evicted while this editor is active. In either case
     * we delete the editor's created files and prevent new files from being created. Note that once
     * an editor has been detached it is possible for another editor to edit the entry.
     */
    internal fun detach() {
      if (entry.currentEditor == this) {
        if (civilizedFileSystem) {

      }
    } else {
      checkArgument(keyEntry == ABSENT, "Key already present: %s", key);
    }

    // insertion point for new entry is after predecessor
    // note predecessor must still be a valid entry: either we deleted an entry that was *not*
    // predecessor, or we didn't delete anything

    ensureCapacity(size + 1);
    keys[size] = key;
    values[size] = value;

   * concurrent modification, the iterator fails quickly and cleanly, rather than risking arbitrary,
   * non-deterministic behavior at an undetermined time in the future.
   *
   * <p>Note that the fail-fast behavior of an iterator cannot be guaranteed as it is, generally
   * speaking, impossible to make any hard guarantees in the presence of unsynchronized concurrent

                if (log.level >= 6) {
                    Hexdump.hexdump( log, sbuf, 4, n );
                }
            }

            out.write( sbuf, 0, 4 + n );
            out.flush();
            /* Note the Transport thread isn't running yet so we can
             * read from the socket here.
             */
            if (peekKey() == null) /* try to read header */

///

Mit `app.include_router()` können wir jeden `APIRouter` zur Hauptanwendung `FastAPI` hinzufügen.

Es wird alle Routen von diesem Router als Teil von dieser inkludieren.

/// note | "Technische Details"

Tatsächlich wird intern eine *Pfadoperation* für jede *Pfadoperation* erstellt, die im `APIRouter` deklariert wurde.