public class Downloader extends java.net.Authenticator
	{
	  protected java.net.PasswordAuthentication getPasswordAuthentication()
	  {
	    return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
	  }
	  public static void main( String[] args ) throws Exception
	  {
	    setDefault( new Downloader() );

include(":samples:static-server")
include(":samples:tlssurvey")
include(":samples:unixdomainsockets")
include(":container-tests")

project(":okhttp-logging-interceptor").name = "logging-interceptor"

val androidHome = System.getenv("ANDROID_HOME")
val localProperties = Properties().apply {
  val file = File("local.properties")
  if (file.exists()) {
    load(file.inputStream())
  }
}
val sdkDir = localProperties.getProperty("sdk.dir")

                    assertThat(peeker.getDone(input1)).isSameInstanceAs("value1");
                    try {
                      peeker.getDone(input2Failed);
                      fail("Peeker.getDone() should fail for failed inputs");
                    } catch (ExecutionException expected) {
                    }
                    try {
                      peeker.getDone(nonInput);

   *         .call(
   *             () ->
   *                 new UsageHistory(
   *                     username,
   *                     Futures.getDone(loginDateFuture),
   *                     Futures.getDone(recentCommandsFuture)),
   *             executor);
   * }
   *
   * @since 20.0
   */
  @GwtCompatible
  public static final class FutureCombiner<V extends @Nullable Object> {

	if err != nil {
		logger.FatalIf(err, "Unable to validate passed arguments in %s:%s",
			config.EnvArgs, os.Getenv(config.EnvArgs))
	}
	if v == "" {
		v, _, _, err = env.LookupEnv(config.EnvVolumes)
		if err != nil {
			logger.FatalIf(err, "Unable to validate passed arguments in %s:%s",
				config.EnvVolumes, os.Getenv(config.EnvVolumes))
		}
	}
	if v == "" {
		// Fall back to older environment value MINIO_ENDPOINTS

Ví dụ, bạn có một file `main.py` với:

```Python hl_lines="3"
import os

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

/// tip

Tham số thứ hai cho <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> là giá trị mặc định để trả về.

🖼 👆 💪 ✔️ 📁 `main.py` ⏮️:

```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> 🔢 💲 📨.

🚥 🚫 🚚, ⚫️ `None` 🔢, 📥 👥 🚚 `"World"` 🔢 💲 ⚙️.

///

⤴️ 👆 💪 🤙 👈 🐍 📋:

                in.close();
            }
        } catch (final IOException ioe) {
            if (LogStream.level > 0) {
                ioe.printStackTrace(log);
            }
        }

        level = Config.getInt("jcifs.smb1.util.loglevel", -1);
        if (level != -1) {
            LogStream.setLevel(level);
        }

        try {
            "".getBytes(DEFAULT_OEM_ENCODING);

例如，你可以建立一個名為 `main.py` 的檔案，其中包含以下內容：

```Python hl_lines="3"
import os

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

/// tip

第二個參數是 <a href="https://docs.python.org/zh-tw/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 的預設回傳值。

如果沒有提供，預設值為 `None`，這裡我們提供 `"World"` 作為預設值。

///

然後你可以呼叫這個 Python 程式：

        /**
         * @return Object
         */
        public Object isDdd() {
            return null;
        }

        /**
         * @return String
         */
        public String getEee() {
            return null;
        }

        /**
         * @param eee
         *            eee
         */
        public void setEee(final String eee) {
        }
    }