# Dependências com yield { #dependencies-with-yield }

O **FastAPI** possui suporte para dependências que realizam <abbr title='às vezes também chamado de "código de saída", "código de limpeza", "código de teardown", "código de fechamento", "código de saída do gerenciador de contexto", etc.'>alguns passos extras ao finalizar</abbr>.

Para fazer isso, utilize `yield` em vez de `return`, e escreva os passos extras (código) depois.

/// tip | Dica

			Optional:    true,
			Type:        "string",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         target.NATSJetStream,
			Description: "enable JetStream support",
			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         target.NATSQueueDir,
			Description: queueDirComment,
			Optional:    true,
			Type:        "path",
		},

*/
package gmp

/*
#cgo LDFLAGS: -lgmp
#include <gmp.h>
#include <stdlib.h>

// gmp 5.0.0+ changed the type of the 3rd argument to mp_bitcnt_t,
// so, to support older versions, we wrap these two functions.
void _mpz_mul_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_mul_2exp(a, b, n);
}
void _mpz_div_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
	mpz_div_2exp(a, b, n);

Para fazer isso, e acomodar as necessidades de diferentes aplicações, existem diferentes opções para esse programa. Algumas escolhas populares são:

* Modificar alguns registros DNS
    * Para isso, o programa de renovação precisa ter suporte às APIs do provedor DNS, então, dependendo do provedor DNS que você utilize, isso pode ou não ser uma opção viável.

	// the current target will stop receiving entries.
	migrateTarget *Target

	// Number of events per HTTP send to webhook target
	// this is ideally useful only if your endpoint can
	// support reading multiple events on a stream for example
	// like : Splunk HTTP Event collector, if you are unsure
	// set this to '1'.
	batchSize   int
	payloadType string

	}

	if age != 10 {
		t.Errorf("Scan with Row, age expects: %v, got %v", user2.Age, age)
	}

	table := "gorm.users"
	if DB.Dialector.Name() != "mysql" || isTiDB() {
		table = "users" // other databases doesn't support select with `database.table`
	}

	DB.Table(table).Where(map[string]interface{}{"name": user2.Name}).Update("age", 20)

	row = DB.Table(table+" as u").Where("u.name = ?", user2.Name).Select("age").Row()

 * project-by-project.
 *
 * <h2>Key Features:</h2>
 * <ul>
 *   <li>Concurrent execution of compatible build steps across projects</li>
 *   <li>Thread-safety validation for plugins</li>
 *   <li>Support for forked executions and lifecycle phases</li>
 *   <li>Dynamic build plan adjustment during execution</li>
 * </ul>
 *
 * <h2>Execution Strategy:</h2>
 * <p>The executor follows these main steps:</p>
 * <ol>

以点 (`.`) 开头的文件是 Unix-like 系统（如 Linux 和 macOS）中的隐藏文件。

但是，dotenv 文件实际上不一定要具有确切的文件名。

///

Pydantic 支持使用外部库从这些类型的文件中读取。您可以在<a href="https://docs.pydantic.dev/latest/concepts/pydantic_settings/#dotenv-env-support" class="external-link" target="_blank">Pydantic 设置: Dotenv (.env) 支持</a>中阅读更多相关信息。

/// tip

要使其工作，您需要执行 `pip install python-dotenv`。

///

### `.env` 文件

您可以使用以下内容创建一个名为 `.env` 的文件：

* ⏳ Existing open PRs will be reviewed and can still be merged if completed within the next 3 weeks (since July 11 2025).

* 🌐 In the future, we will only support languages where at least three active native speakers are available to review and maintain translations.

To do that, and to accommodate different application needs, there are several ways it can do it. Some popular ways are:

* **Modify some DNS records**.
    * For this, the renewal program needs to support the APIs of the DNS provider, so, depending on the DNS provider you are using, this might or might not be an option.