O caminho mais comum de fazer isso é ter um arquivo `requirements.txt` com os nomes dos pacotes e suas versões, um por linha.

Você, naturalmente, usaria as mesmas ideias que você leu em [Sobre Versões do FastAPI](versions.md){.internal-link target=_blank} para definir os intervalos de versões.

Por exemplo, seu `requirements.txt` poderia parecer com:

```
fastapi>=0.68.0,<0.69.0
pydantic>=1.8.0,<2.0.0

  // kind is the kind for the resource (e.g. 'Foo' is the kind for a resource 'foo')
  optional string kind = 3;

  // verbs is a list of supported kube verbs (this includes get, list, watch, create,
  // update, patch, delete, deletecollection, and proxy)
  optional Verbs verbs = 4;

  // shortNames is a list of suggested short names of the resource.
  repeated string shortNames = 5;

Il possède un système d'injection de dépendances intégré, inspiré d'Angular 2. Il nécessite de pré-enregistrer les "injectables" (comme tous les autres systèmes d'injection de dépendances que je connais), donc, cela ajoute à la verbosité et à la répétition du code.

Comme les paramètres sont décrits avec des types TypeScript (similaires aux type hints de Python), la prise en charge
par l'éditeur est assez bonne.

# Primeros pasos

Un archivo muy simple de FastAPI podría verse así:

```Python
{!../../docs_src/first_steps/tutorial001.py!}
```

Copia eso a un archivo `main.py`.

Corre el servidor en vivo:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

Se você utiliza uma versão anterior, ocorrerão erros ao tentar utilizar `Annotated`.

Certifique-se de [Atualizar a versão do FastAPI](../../deployment/versions.md#atualizando-as-versoes-do-fastapi){.internal-link target=_blank} para pelo menos 0.95.1 antes de usar `Annotated`.

///

### Importando `Depends`

//// tab | Python 3.10+

```Python hl_lines="3"

    assertThat(body.contentLength()).isEqualTo(3)
    assertThat(bodyToHex(body)).isEqualTo("616263")
    assertThat(bodyToHex(body), "Retransmit body").isEqualTo("616263")
  }

  /** Common verbs used for apis such as GitHub, AWS, and Google Cloud.  */
  @Test
  fun crudVerbs() {
    val contentType = "application/json".toMediaType()
    val body = "{}".toRequestBody(contentType)

Ele também não controla modelos aninhados muito bem. Então, se o corpo JSON na requisição for um objeto JSON que contém campos internos que contém objetos JSON aninhados, ele não consegue ser validado e documentado apropriadamente.

"iekšpus", "nedz", "tik", "nevis", "turpretim", "jeb", "iekam", "iekām", "iekāms", "kolīdz", "līdzko", "tiklīdz", "jebšu", "tālab", "tāpēc", "nekā", "itin", "jā", "jau", "jel", "nē", "nezin", "tad", "tikai", "vis", "tak", "iekams", "vien", "# modal verbs", "būt  ", "biju ", "biji", "bija", "bijām", "bijāt", "esmu", "esi", "esam", "esat ", "būšu     ", "būsi", "būs", "būsim", "būsiet", "tikt", "tiku", "tiki", "tika", "tikām", "tikāt", "tieku", "tiec", "tiek", "tiekam", "tiekat", "tikšu", "tiks", "tiksim",...

"iekšpus", "nedz", "tik", "nevis", "turpretim", "jeb", "iekam", "iekām", "iekāms", "kolīdz", "līdzko", "tiklīdz", "jebšu", "tālab", "tāpēc", "nekā", "itin", "jā", "jau", "jel", "nē", "nezin", "tad", "tikai", "vis", "tak", "iekams", "vien", "# modal verbs", "būt  ", "biju ", "biji", "bija", "bijām", "bijāt", "esmu", "esi", "esam", "esat ", "būšu     ", "būsi", "būs", "būsim", "būsiet", "tikt", "tiku", "tiki", "tika", "tikām", "tikāt", "tieku", "tiec", "tiek", "tiekam", "tiekat", "tikšu", "tiks", "tiksim",...

pkg syscall (darwin-386), const VEOL ideal-int
pkg syscall (darwin-386), const VEOL2 = 2
pkg syscall (darwin-386), const VEOL2 ideal-int
pkg syscall (darwin-386), const VERASE = 3
pkg syscall (darwin-386), const VERASE ideal-int
pkg syscall (darwin-386), const VINTR = 8
pkg syscall (darwin-386), const VINTR ideal-int
pkg syscall (darwin-386), const VKILL = 5
pkg syscall (darwin-386), const VKILL ideal-int