En la versión 1 de Pydantic la configuración se hacía en una clase interna `Config`, en la versión 2 de Pydantic se hace en un atributo `model_config`. Este atributo toma un `dict`, y para obtener autocompletado y errores en línea, puedes importar y usar `SettingsConfigDict` para definir ese `dict`.

///

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

If you are building a <abbr title="Command Line Interface">CLI</abbr> app to be used in the terminal instead of a web API, check out <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>.

**특정 프로그램 호출**에 대해서만 사용할 수 있는 환경 변수를 만들 수도 있습니다. 해당 프로그램에서만 사용할 수 있고, 해당 프로그램이 실행되는 동안만 사용할 수 있습니다.

그렇게 하려면 프로그램 바로 앞, 같은 줄에 환경 변수를 만들어야 합니다:

<div class="termy">

```console
// Create an env var MY_NAME in line for this program call
$ MY_NAME="Wade Wilson" python main.py

// Now it can read the environment variable

Hello Wade Wilson from Python

// The env var no longer exists afterwards
$ python main.py

/**
 * Unit tests on <code>MavenProperties</code>.
 */
@Deprecated
public class MavenPropertiesTest {

    private static final String LINE_SEPARATOR = System.getProperty("line.separator");
    private static final String COMMENT = "# comment";
    private static final String KEY1 = "mvn:foo/bar";
    private static final String KEY1A = "mvn\\:foo/bar";

	Timestamp       int64  // Timestamp set at the time of initialization.
	TimeLastRefresh int64  // Timestamp for last lock refresh.
	Source          string // Contains line, function and filename requesting the lock.
	Group           bool   // indicates if it was a group lock.
	Owner           string // Owner represents the UUID of the owner who originally requested the lock.

		// and also skip traces with function name that starts with "runtime."
		if !strings.HasPrefix(file, "<autogenerated>") &&
			!strings.HasPrefix(funcName, "runtime.") {
			// Form and append a line of stack trace into a
			// collection, 'trace', to build full stack trace
			trace = append(trace, fmt.Sprintf("%v:%v:%v()", file, lineNumber, funcName))

			// Ignore trace logs beyond the following conditions

func timeZone(offset time.Duration) *time.Location {
	const (
		minOffset   = -12 * time.Hour  // E.g., Baker island at -12:00
		maxOffset   = +14 * time.Hour  // E.g., Line island at +14:00
		offsetAlias = 15 * time.Minute // E.g., Nepal at +5:45
	)
	offset = offset.Round(offsetAlias)
	if offset < minOffset || maxOffset < offset {
		offset = 0
	}

<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>

If you are building a <abbr title="Command Line Interface">CLI</abbr> app to be used in the terminal instead of a web API, check out <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>.

        assertFalse(robotsTxt.allows("/path1/", "CommentBot"));
        assertTrue(robotsTxt.allows("/path2/", "CommentBot"));

        // Test EmptyLineBot - empty lines should not cause issues
        assertFalse(robotsTxt.allows("/test/", "EmptyLineBot"));
        assertTrue(robotsTxt.allows("/public/", "EmptyLineBot"));

```

</div>

////

/// tip

Every time you install a **new package** in that environment, **activate** the environment again.

This makes sure that if you use a **terminal (<abbr title="command line interface">CLI</abbr>) program** installed by that package, you use the one from your virtual environment and not any other that could be installed globally, probably with a different version than what you need.

///