/**
   * Keeps track of metadata like the number of hash table bits and modifications of this data
   * structure (to make it possible to throw ConcurrentModificationException in the iterator). Note
   * that we choose not to make this volatile, so we do less of a "best effort" to track such
   * errors, for better performance.
   */
  private transient int metadata;

import javax.annotation.CheckForNull;

/**
 * An object of this class encapsulates type mappings from type variables. Mappings are established
 * with {@link #where} and types are resolved using {@link #resolveType}.
 *
 * <p>Note that usually type mappings are already implied by the static type hierarchy (for example,
 * the {@code E} type variable declared by class {@code List} naturally maps to {@code String} in

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")

      return new ImmutableSortedMap<>(
          ImmutableSortedSet.emptySet(comparator), ImmutableList.<V>of());
    }
  }

  /**
   * Returns the empty sorted map.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  @SuppressWarnings("unchecked")
  // unsafe, comparator() returns a comparator on the specified type

	if fi.Metadata == nil {
		fi.Metadata = make(map[string]string)
	}
	fi.Metadata[ReservedMetadataPrefixLower+tierFVMarker] = ""
}

// SetSkipTierFreeVersion indicates to skip adding a tier free version id.
// Note: Used only when expiring tiered objects and the remote content has
// already been scheduled for deletion
func (fi *FileInfo) SetSkipTierFreeVersion() {
	if fi.Metadata == nil {
		fi.Metadata = make(map[string]string)
	}

                            // Select an appropriate available version from the (now restricted) range
                            // Note this version was selected before to get the appropriate POM
                            // But it was reset by the call to setVersionRange on restricting the version

**FastAPI** এই টাইপ হিন্টগুলির উপর ভিত্তি করে নির্মিত, যা এটিকে অনেক সুবিধা এবং লাভ প্রদান করে।

তবে, আপনি যদি কখনো **FastAPI** ব্যবহার নাও করেন, তবুও এগুলি সম্পর্কে একটু শেখা আপনার উপকারে আসবে।

/// note

যদি আপনি একজন Python বিশেষজ্ঞ হন, এবং টাইপ হিন্ট সম্পর্কে সবকিছু জানেন, তাহলে পরবর্তী অধ্যায়ে চলে যান।

///

## প্রেরণা

চলুন একটি সাধারণ উদাহরণ দিয়ে শুরু করি:

```Python