Las variables de entorno pueden ser útiles para manejar **configuraciones** de aplicaciones, como parte de la **instalación** de Python, etc.

## Crear y Usar Variables de Entorno { #create-and-use-env-vars }

Puedes **crear** y usar variables de entorno en la **shell (terminal)**, sin necesidad de Python:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console

    checkUnmodifiableMultimap(
        ArrayListMultimap.<@Nullable String, @Nullable Integer>create(), true);
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testSerializingUnmodifiableArrayListMultimap() {
    Multimap<String, Integer> unmodifiable =
        prepareUnmodifiableTests(ArrayListMultimap.<String, Integer>create(), true, null, null);
    SerializableTester.reserializeAndAssert(unmodifiable);
  }

    new EqualsTester()
        .addEqualityGroup(
            RemovalNotification.create("one", 1, RemovalCause.EXPLICIT),
            RemovalNotification.create("one", 1, RemovalCause.REPLACED))
        .addEqualityGroup(RemovalNotification.create("1", 1, RemovalCause.EXPLICIT))
        .addEqualityGroup(RemovalNotification.create("one", 2, RemovalCause.EXPLICIT))
        .testEquals();
  }

    SettableFuture<String> future = SettableFuture.create();
    SettableFuture<String> nested = SettableFuture.create();
    assertTrue(future.setFuture(nested));
    // Later attempts to set the future should return false.
    assertFalse(future.set("x"));
    assertFalse(future.setException(new Exception("bar")));
    assertFalse(future.setFuture(SettableFuture.create()));
    // Check that the future has been set properly.

      assertThrows(NullPointerException.class, () -> table.put("bar", 1, nullableCellValue(null)));
    }
  }

  public void testPutAllTable() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    Table<String, Integer, @NonNull C> other = HashBasedTable.create();
    other.put("foo", 1, cellValue('d'));
    other.put("bar", 2, cellValue('e'));
    other.put("cat", 2, cellValue('f'));
    table.putAll(other);

        BiMapTestSuiteBuilder.using(
                new TestStringBiMapGenerator() {
                  @Override
                  protected BiMap<String, String> create(Entry<String, String>[] entries) {
                    BiMap<String, String> bimap = HashBiMap.create(entries.length);
                    for (Entry<String, String> entry : entries) {
                      checkArgument(!bimap.containsKey(entry.getKey()));

	defer func() {
		if err := tearDownQueueStore(); err != nil {
			t.Fatal("Failed to tear down store ", err)
		}
	}()
	store, err := setUpQueueStore(queueDir, 100)
	if err != nil {
		t.Fatal("Failed to create a queue store ", err)
	}
	// Put 100 items.
	for range 100 {
		if _, err := store.Put(testItem); err != nil {
			t.Fatal("Failed to put to queue store ", err)
		}
	}
	// Count the items.
	keys := store.List()

        UnsupportedOperationException.class,
        () -> multimap().putAll(getSubjectGenerator().create(mapEntry(k3(), v3()))));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  // Empty multimaps *do* have defined equals semantics.
  @SuppressWarnings("UndefinedEquals")
  public void testPutAllIntoEmpty() {
    Multimap<K, V> target = getSubjectGenerator().create();
    assertEquals(!multimap().isEmpty(), target.putAll(multimap()));

        UnsupportedOperationException.class,
        () -> multimap().putAll(getSubjectGenerator().create(mapEntry(k3(), v3()))));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  // Empty multimaps *do* have defined equals semantics.
  @SuppressWarnings("UndefinedEquals")
  public void testPutAllIntoEmpty() {
    Multimap<K, V> target = getSubjectGenerator().create();
    assertEquals(!multimap().isEmpty(), target.putAll(multimap()));

        }

        try {
            // Create SmbFile with cached attributes
            SmbFile file = new SmbFile(filePath, context);
            // Note: We would need to add a method to SmbFile to set cached attributes
            // For now, just return the file object
            return file;
        } catch (Exception e) {
            log.warn("Failed to create SmbFile for {}: {}", filePath, e.getMessage());