last the Dodo said, `EVERYBODY has won, and all must have
prizes.'

  `But who is to give the prizes?' quite a chorus of voices
asked.

  `Why, SHE, of course,' said the Dodo, pointing to Alice with
one finger; and the whole party at once crowded round her,
calling out in a confused way, `Prizes! Prizes!'

  Alice had no idea what to do, and in despair she put her hand

	config.Lock()
	defer config.Unlock()

	var ok bool
	// Lookup in-memory drivercache
	d, ok = config.drivercache[tierName]
	if ok {
		return d, nil
	}

	// Initialize driver from tier config matching tierName
	t, ok := config.Tiers[tierName]
	if !ok {
		return nil, errTierNotFound
	}
	d, err = newWarmBackend(ctx, t, false)
	if err != nil {
		return nil, err
	}

Der erste Typ-Parameter ist für die Schlüssel des `dict`.

Der zweite Typ-Parameter ist für die Werte des `dict`:

{* ../../docs_src/python_types/tutorial008_py39.py hl[1] *}

Das bedeutet:

* Die Variable `prices` ist ein `dict`:
    * Die Schlüssel dieses `dict` sind vom Typ `str` (z. B. die Namen der einzelnen Artikel).
    * Die Werte dieses `dict` sind vom Typ `float` (z. B. der Preis jedes Artikels).

   * input bit(i) and output bit(j), two pairs of keys must be found with all bits identical except
   * bit(i). One pair must differ in output bit(j), and one pair must not. This proves that input
   * bit(i) can alter output bit(j).
   */
  static void checkNoFunnels(HashFunction function) {
    Random rand = new Random(0);
    int keyBits = 32;
    int hashBits = function.bits();

#### `Dict`

`dict`を宣言するためには、カンマ区切りで2つの型パラメータを渡します。

最初の型パラメータは`dict`のキーです。

２番目の型パラメータは`dict`の値です。

{* ../../docs_src/python_types/tutorial008.py hl[1,4] *}


つまり:

* 変数`prices`は`dict`であり:
    * この`dict`のキーは`str`型です。（つまり、各項目の名前）
    * この`dict`の値は`float`型です。（つまり、各項目の価格）

#### `Optional`

また、`Optional`を使用して、変数が`str`のような型を持つことを宣言することもできますが、それは「オプション」であり、`None`にすることもできます。

The first type parameter is for the keys of the `dict`.

The second type parameter is for the values of the `dict`:

{* ../../docs_src/python_types/tutorial008_py39.py hl[1] *}

This means:

* The variable `prices` is a `dict`:
    * The keys of this `dict` are of type `str` (let's say, the name of each item).
    * The values of this `dict` are of type `float` (let's say, the price of each item).

#### Union { #union }

---

"_A **Netflix** tem o prazer de anunciar o lançamento open-source do nosso framework de orquestração de **gerenciamento de crises**: **Dispatch**! [criado com **FastAPI**]_"

      List<ReferenceEntry<Object, Object>> writes = new ArrayList<>();
      Iterator<ReferenceEntry<Object, Object>> i = writeOrder.iterator();
      while (i.hasNext()) {
        ReferenceEntry<Object, Object> entry = i.next();
        if (random.nextBoolean()) {
          segment.recordWrite(entry, 1, map.ticker.read());
          writes.add(entry);
          i.remove();
        }
      }

      List<ReferenceEntry<Object, Object>> writes = new ArrayList<>();
      Iterator<ReferenceEntry<Object, Object>> i = writeOrder.iterator();
      while (i.hasNext()) {
        ReferenceEntry<Object, Object> entry = i.next();
        if (random.nextBoolean()) {
          segment.recordWrite(entry, 1, map.ticker.read());
          writes.add(entry);
          i.remove();
        }
      }

O segundo parâmetro de tipo é para os valores do `dict`:

{* ../../docs_src/python_types/tutorial008_py39.py hl[1] *}

Isso significa que:

* A variável `prices` é um `dict`:
    * As chaves deste `dict` são do tipo `str` (digamos, o nome de cada item).
    * Os valores deste `dict` são do tipo `float` (digamos, o preço de cada item).

#### Union { #union }