* [okhttp-client-mock](https://github.com/gmazzo/okhttp-client-mock): A simple OKHttp client mock, using a programmable request interceptor.
 * [OkHttp Profiler](https://plugins.jetbrains.com/plugin/11249-okhttp-profiler): An IntelliJ plugin for monitoring OkHttp calls.
 * [OkReplay](https://github.com/airbnb/okreplay): Record and replay OkHttp network interaction in your tests.

在最近的 Python 開發者調查中，我們能看到[被使用最多的功能是 autocompletion](https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features)。

整個 **FastAPI** 框架就是基於這一點，任何地方都可以進行自動補齊。

你幾乎不需要經常來回看文件。

在這裡，你的編輯器可能會這樣幫助你：

* 在 [Visual Studio Code](https://code.visualstudio.com/) 中:

![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png)

* 在 [PyCharm](https://www.jetbrains.com/pycharm/) 中:

이전 스크린샷은 [Visual Studio Code](https://code.visualstudio.com)로 찍은 것입니다.

하지만 똑같은 편집기 지원을 [PyCharm](https://www.jetbrains.com/pycharm/)와 대부분의 다른 파이썬 편집기에서도 받을 수 있습니다:

<img src="/img/tutorial/body/image05.png">

/// tip | 팁

만약 [PyCharm](https://www.jetbrains.com/pycharm/)를 편집기로 사용한다면, [Pydantic PyCharm Plugin](https://github.com/koxudaxi/pydantic-pycharm-plugin/)을 사용할 수 있습니다.

repeating in this section because it has come up in this context.

[intellij]: https://blog.jetbrains.com/idea/2017/07/intellij-idea-2017-2-is-here-smart-sleek-and-snappy/
[Checkstyle]: https://plugins.jetbrains.com/plugin/1065-checkstyle-idea
[spotless]: https://github.com/diffplug/spotless
[Eclipse Code Formatter]: https://plugins.jetbrains.com/plugin/6546-eclipse-code-formatter

Probé varias ideas en los editores de Python más populares: PyCharm, VS Code, editores basados en Jedi.

Según la última [Encuesta de Desarrolladores de Python](https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools), estos editores cubren alrededor del 80% de los usuarios.

I tested several ideas in the most popular Python editors: PyCharm, VS Code, Jedi based editors.

By the last [Python Developer Survey](https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools), that covers about 80% of the users.

Eu testei várias ideias nos editores Python mais populares: PyCharm, VS Code, e editores baseados no Jedi.

Pela última [Pesquisa do Desenvolvedor Python](https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools), isso cobre cerca de 80% dos usuários.

  * When annotating existing internal code, use `org.jetbrains.annotations.Contract`, e.g. `@Contract(null -> null; !null -> !null)`.
      When doing so, still annotate nullable parameters and the return type as `@Nullable`.
  * Do not use `@Contract` for public APIs.

## 设计 { #design }

然后，我又花了一些时间从用户角度（使用 FastAPI 的开发者）设计了开发者 **API**。

同时，我还在最流行的 Python 代码编辑器中测试了很多思路，包括 PyCharm、VS Code、基于 Jedi 的编辑器。

根据最新 [Python 开发者调研报告](https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools)显示，这几种编辑器覆盖了约 80% 的用户。

也就是说，**FastAPI** 针对差不多 80% 的 Python 开发者使用的编辑器进行了测试，而且其它大多数编辑器的工作方式也与之类似，因此，**FastAPI** 的优势几乎能在所有编辑器上体现。

    assertFalse(set.contains(0));
    assertTrue(set.contains(1));
    assertTrue(set.contains(2));
    assertTrue(set.contains(3));
    assertFalse(set.contains(4));
  }

  // TODO: https://youtrack.jetbrains.com/issue/KT-71001/ - Enable when Kotlin throws expected CCE.
  @J2ktIncompatible
  public void testContains_typeMismatch() {
    ImmutableSortedSet<Integer> set = ContiguousSet.create(Range.open(0, 4), integers());