Örneğin `main.py` adında bir dosyanız şöyle olabilir:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | İpucu

[`os.getenv()`](https://docs.python.org/3.8/library/os.html#os.getenv) fonksiyonunun ikinci argümanı, bulunamadığında döndürülecek varsayılan (default) değerdir.

        System.err.println("PR head: " + prHead);
        System.err.println("Base: " + baseSha);

        // One SHA per line to stdout so callers can pipe safely.
        System.out.print(stdout("git", "rev-list", baseSha + ".." + prHead));
    }

    private static boolean refExists(String ref) throws IOException, InterruptedException {
        ExecResult r = exec("git", "rev-parse", "--verify", ref);

dP, dQ, and qInv may be nil if the key was created with // NewPrivateKeyWithout. func (priv *PrivateKey) Export() (N []byte, e int, d, P, Q, dP, dQ, qInv []byte) { N = priv.pub.N.Nat().Bytes(priv.pub.N) e = priv.pub.E d = priv.d.Bytes(priv.pub.N) if priv.dP == nil { return } P = priv.p.Nat().Bytes(priv.p) Q = priv.q.Nat().Bytes(priv.q) dP = bytes.Clone(priv.dP) dQ = bytes.Clone(priv.dQ) qInv = priv.qInv.Bytes(priv.p) return } // checkPrivateKey is called by the NewPrivateKey and GenerateKey functions,...

import javax.net.ssl.X509TrustManager
import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.CertificatePinner.Companion.pin
import okhttp3.testing.PlatformRule
import okhttp3.tls.HandshakeCertificates
import okhttp3.tls.HeldCertificate
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test

             * for whatever reason. I copy over the uid here so it appears correct
             * in logging output. Logging of andx segments of messages inadvertantly
             * print header information because of the way toString always makes a
             * super.toString() call(see toString() at the end of all smbs classes).
             */

            andx.uid = uid;

Например, у вас есть файл `main.py`:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Совет

Второй аргумент [`os.getenv()`](https://docs.python.org/3.8/library/os.html#os.getenv) - это возвращаемое по умолчанию значение.

Наприклад, у вас може бути файл `main.py` з:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Порада

Другий аргумент до [`os.getenv()`](https://docs.python.org/3.8/library/os.html#os.getenv) - це значення за замовчуванням, яке буде повернено.

* `value` : c'est l'exemple réel affiché, par ex. un `dict`.
* `externalValue` : alternative à `value`, une URL pointant vers l'exemple. Cependant, cela pourrait ne pas être pris en charge par autant d'outils que `value`.

Vous pouvez l'utiliser ainsi :

{* ../../docs_src/schema_extra_example/tutorial005_an_py310.py hl[23:49] *}

```Python
user_dict = user_in.model_dump()
```

nous avons maintenant un `dict` avec les données dans la variable `user_dict` (c'est un `dict` au lieu d'un objet modèle Pydantic).

Et si nous appelons :

```Python
print(user_dict)
```

nous obtiendrions un `dict` Python contenant :

```Python
{
    'username': 'john',
    'password': 'secret',
    'email': '******@****.***',
    'full_name': None,
}
```

	// Get saved credentials.
	cred := globalActiveCred

	// Get saved region.
	region := globalSite.Region()

	apiEndpointStr := strings.TrimSpace(strings.Join(apiEndpoints, "  "))
	// Colorize the message and print.
	logger.Startup(color.Blue("API: ") + color.Bold(fmt.Sprintf("%s ", apiEndpointStr)))
	if color.IsTerminal() && (!globalServerCtxt.Anonymous && !globalServerCtxt.JSON && globalAPIConfig.permitRootAccess()) {