For example you could have a file `main.py` with:

```Python hl_lines="3"
import os

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

/// tip

The second argument to <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is the default value to return.

Je kunt bijvoorbeeld een bestand `main.py` hebben met:

```Python hl_lines="3"
import os

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

/// tip

Het tweede argument van <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is de standaardwaarde die wordt geretourneerd.

   *
   * <p>Similar methods:
   *
   * <ul>
   *   <li>To retrieve a result from a {@code Future} that is already done, use {@link
   *       Futures#getDone Futures.getDone}.
   *   <li>To treat {@link InterruptedException} uniformly with other exceptions, use {@link
   *       Futures#getChecked(Future, Class) Futures.getChecked}.

        // Then
        Field notifyFlagsField = Smb2ChangeNotifyRequest.class.getDeclaredField("notifyFlags");
        notifyFlagsField.setAccessible(true);
        assertEquals(flags, notifyFlagsField.getInt(request));
    }

    @Test
    @DisplayName("Should set completion filter correctly")
    void testSetCompletionFilter() throws Exception {
        // Given

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.Futures.getDone;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;

        FieldUtil.set(field, this, Integer.valueOf(testData));
        assertThat(FieldUtil.getInt(field, this), is(testData));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testGetIntFieldObject() throws Exception {
        final Field field = getClass().getField("INT_DATA");
        assertThat(FieldUtil.getInt(field), is(INT_DATA));
    }

    /**
     * @throws Exception
     */
    @Test

    private static final int SND_BUF_SIZE = Config.getInt("jcifs.smb1.netbios.snd_buf_size", DEFAULT_SND_BUF_SIZE);
    private static final int RCV_BUF_SIZE = Config.getInt("jcifs.smb1.netbios.rcv_buf_size", DEFAULT_RCV_BUF_SIZE);
    private static final int SO_TIMEOUT = Config.getInt("jcifs.smb1.netbios.soTimeout", DEFAULT_SO_TIMEOUT);
    private static final int RETRY_COUNT = Config.getInt("jcifs.smb1.netbios.retryCount", DEFAULT_RETRY_COUNT);

    static final int SMB_FILE_NAMES_INFO = 0x103;
    static final int SMB_FILE_BOTH_DIRECTORY_INFO = 0x104;

    static final int LIST_SIZE = Config.getInt("jcifs.smb1.smb.client.listSize", DEFAULT_LIST_SIZE);
    static final int LIST_COUNT = Config.getInt("jcifs.smb1.smb.client.listCount", DEFAULT_LIST_COUNT);

    Trans2FindFirst2(final String filename, final String wildcard, final int searchAttributes) {

        String response = checkGetMethod(searchBody, getListEndpointSuffix()).asString();
        final int total = JsonPath.from(response).getInt("response.total");
        final List<Map<String, String>> items = JsonPath.from(response).getList("response.settings");
        final int status = JsonPath.from(response).getInt("response.status");
        assertEquals(total, items.size());
        assertEquals(0, status);
    }

উদাহরণস্বরূপ, আপনার `main.py` নামে একটি ফাইল থাকতে পারেঃ

```Python hl_lines="3"
import os

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

/// tip

<a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> এর দ্বিতীয় আর্গুমেন্টটি হলো এর ডিফল্ট ভ্যালু যা রিটার্ন করা হবে।