Para fazer isso, use a dica de tipo padrão do Python <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>:

/// note

Для этого используйте стандартные аннотации типов в Python <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>:

/// note | Примечание

## 結論

透過這個教學，你應該對**環境變數**是什麼以及如何在 Python 中使用它們有了基本的了解。

你也可以在<a href="https://zh.wikipedia.org/wiki/%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F" class="external-link" target="_blank">環境變數 - 維基百科</a> (<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia for Environment Variable</a>) 中了解更多關於它們的資訊。

在許多情況下，環境變數的用途和適用性可能不會立刻顯現。但是在開發過程中，它們會在許多不同的場景中出現，因此瞭解它們是非常必要的。

 * 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
 * the context of {@code class MyStringList implements List<String>}). In such case, prefer to use

////

/// info | Informação

Para saber mais sobre o <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic, verifique a sua documentação</a>.

///

O **FastAPI** é todo baseado em Pydantic.

Você verá muito mais disso na prática no [Tutorial - Guia do usuário](tutorial/index.md){.internal-link target=_blank}.

/// tip | Dica

{* ../../docs_src/app_testing/tutorial002.py hl[27:31] *}

/// note | Nota

Para mais detalhes, confira a documentação do Starlette para <a href="https://www.starlette.io/testclient/#testing-websocket-sessions" class="external-link" target="_blank">testar WebSockets</a>.

import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.MockitoAnnotations;

/**
 * Unit tests for the {@link TransWaitNamedPipe} transaction.
 * The transaction is package private, so the test class lives in the
 * same package to access its fields.
 */
public class TransWaitNamedPipeTest {

    @BeforeEach

👉 💼, 📤 3️⃣ 🔢 🔢:

* `needy`, ✔ `str`.
* `skip`, `int` ⏮️ 🔢 💲 `0`.
* `limit`, 📦 `int`.

/// tip

👆 💪 ⚙️ `Enum`Ⓜ 🎏 🌌 ⏮️ [➡ 🔢](path-params.md#_7){.internal-link target=_blank}.

    title: Auth, user management and more for your B2B product
    img: https://fastapi.tiangolo.com/img/sponsors/propelauth.png
  - url: https://zuplo.link/fastapi-gh
    title: 'Zuplo: Deploy, Secure, Document, and Monetize your FastAPI'
    img: https://fastapi.tiangolo.com/img/sponsors/zuplo.png
  - url: https://liblab.com?utm_source=fastapi

{* ../../docs_src/app_testing/tutorial002.py hl[27:31] *}

/// note | Not

Daha fazla detay için Starlette'in <a href="https://www.starlette.io/staticfiles/" class="external-link" target="_blank">Websockets'i Test Etmek</a> dokümantasyonunu inceleyin.