if (outputFile.exists()) {
                outputFile.delete();
            }
        }
    }

    // Test variable replacement logic without triggering component dependencies
    @Test
    public void test_variable_replacement_logic() throws Exception {
        // Test the variable replacement logic directly
        final List<String> commands =

	RET
TEXT ·a8(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	ADDQ AX, R15 // ERROR "when dynamic linking, R15 is clobbered by a global variable access and is used here"
	RET
TEXT ·a9(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	ORQ R15, R15 // ERROR "when dynamic linking, R15 is clobbered by a global variable access and is used here"
	RET

    }

    /**
     * Returns the system environment variable value for the specified key.
     *
     * @param key the environment variable key
     * @return the environment variable value, or null if not found
     */
    public static String getEnv(String key) {
        return System.getenv(key);
    }

    /**
     * Returns the system environment variable value for the specified key, or the default value if not found.

{* ../../docs_src/settings/tutorial001_py310.py hl[18:20] *}

### Server'ı çalıştırın { #run-the-server }

Sonraki adımda server'ı çalıştırırken konfigürasyonları environment variable olarak geçersiniz; örneğin `ADMIN_EMAIL` ve `APP_NAME` şu şekilde ayarlanabilir:

<div class="termy">

```console
$ ADMIN_EMAIL="******@****.***" APP_NAME="ChimichangApp" fastapi run main.py

import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.annotations.Nullable;

/**
 * The Interpolator service provides methods for variable substitution in strings and maps.
 * It allows for the replacement of placeholders (e.g., ${variable}) with their corresponding values.
 *
 * @since 4.0.0
 */
@Experimental
public interface Interpolator extends Service {

    /**

* `list`
* `tuple`
* `set`
* `dict`

#### List { #list }

Por exemplo, vamos definir uma variável para ser uma `list` de `str`.

Declare a variável, com a mesma sintaxe com dois pontos (`:`).

Como o tipo, coloque `list`.

Como a lista é um tipo que contém tipos internos, você os coloca entre colchetes:

 *       String}.
 * </ul>
 *
 * This is the same behavior as type-variable usages have to Kotlin and to the Checker Framework.
 * Contrast the method above to:
 *
 * <ul>
 *   <li>methods whose return type is a type variable but which can never return {@code null},
 *       typically because the type forbids nullable type arguments: For example, {@code

        value = "${very.long.property.name.with.many.dots}";
        assertEquals("long", ResourceUtil.resolve(value));

        // Test multiple occurrences of same variable
        System.setProperty("repeat", "X");
        value = "${repeat}${repeat}${repeat}";
        assertEquals("XXX", ResourceUtil.resolve(value));

        // Clean up
        System.clearProperty("empty");

                    .parser(parser)
                    .variable(LineReader.LIST_MAX, 50) // max tab completion candidates
                    .variable(LineReader.HISTORY_FILE, history)
                    .variable(LineReader.OTHERS_GROUP_NAME, "Others")
                    .variable(LineReader.COMPLETION_STYLE_GROUP, "fg:blue,bold")
                    .variable("HELP_COLORS", "ti=1;34:co=38:ar=3:op=33:de=90")

Now, when the program loads things in memory, for example, a machine learning model in a variable, or the contents of a large file in a variable, all that **consumes a bit of the memory (RAM)** of the server.