Files.createFile(targetFile);

            // First delete succeeds
            assertTrue(Files.deleteIfExists(targetFile));

            // Second delete returns false (file already gone)
            assertFalse(Files.deleteIfExists(targetFile));
        } finally {
            deleteDirectory(tempDir.toFile());
        }
    }

  }

  public void testCopyOf_array_empty() {
    /*
     * We don't guarantee the same-as property, so we aren't obligated to test it. However, it's
     * useful in testing - when two things are the same then one can't have bugs the other doesn't.
     */
    assertThat(ImmutableDoubleArray.copyOf(new double[0]))
        .isSameInstanceAs(ImmutableDoubleArray.of());
  }

  public void testCopyOf_array_nonempty() {

  const char task1_name[] = "/job:localhost/replica:0/task:1/device:CPU:0";
  const char task2_name[] = "/job:localhost/replica:0/task:2/device:CPU:0";

  // Create one variable per task.
  TFE_TensorHandle* h0 = TestVariable(ctx, 1.0, task1_name);
  TFE_TensorHandle* h1 = TestVariable(ctx, 2.0, task2_name);
  TFE_TensorHandle* h2 = TestVariable(ctx, 3.0, task0_name);

        .getInputStream()
    assertThat(inputStream!!.read()).isEqualTo('B'.code)
  }

  /**
   * Throttle the request body by sleeping 500ms after every 3 bytes. With a 6-byte request, this
   * should yield one sleep for a total delay of 500ms.
   */
  @Test
  fun throttleRequest() {
    assumeNotWindows()
    server.enqueue(
      MockResponse
        .Builder()
        .throttleBody(3, 500, TimeUnit.MILLISECONDS)

type InvalidUploadID struct {
	Bucket   string
	Object   string
	UploadID string
}

func (e InvalidUploadID) Error() string {
	return "Invalid upload id " + e.UploadID
}

// InvalidPart One or more of the specified parts could not be found
type InvalidPart struct {
	PartNumber int
	ExpETag    string
	GotETag    string
}

func (e InvalidPart) Error() string {

}

// ReadRune reads and returns the next UTF-8-encoded
// Unicode code point from the buffer.
// If no bytes are available, the error returned is io.EOF.
// If the bytes are an erroneous UTF-8 encoding, it
// consumes one byte and returns U+FFFD, 1.
func (b *Buffer) ReadRune() (r rune, size int, err error) {
	if b.empty() {
		// Buffer is empty, reset to recover space.
		b.Reset()
		return 0, 0, io.EOF
	}
	c := b.buf[b.off]

   * ("constant maps"). Example:
   *
   * {@snippet :
   * static final ImmutableMap<String, Integer> WORD_TO_INT =
   *     new ImmutableMap.Builder<String, Integer>()
   *         .put("one", 1)
   *         .put("two", 2)
   *         .put("three", 3)
   *         .buildOrThrow();
   * }
   *
   * <p>For <i>small</i> immutable maps, the {@code ImmutableMap.of()} methods are even more

		t.Errorf("should only update one record, but got %v", rowsAffected)
	}

	if rowsAffected := DB.Model(users).Where("age > 0").Update("name", "jinzhu").RowsAffected; rowsAffected != 3 {
		t.Errorf("should only update one record, but got %v", rowsAffected)
	}
}

func TestUpdates(t *testing.T) {
	users := []*User{

print(f"Hello {name} from Python")
```

/// tip | Consejo

El segundo argumento de [`os.getenv()`](https://docs.python.org/3.8/library/os.html#os.getenv) es el valor por defecto a retornar.

Si no se proporciona, es `None` por defecto; aquí proporcionamos `"World"` como el valor por defecto para usar.

///

Luego podrías llamar a ese programa Python:

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

<div class="termy">

```console

* Add perma-failed deployments API ([#19343](https://github.com/kubernetes/kubernetes/pull/19343), [@kargakis](https://github.com/kargakis))

### Other notable changes

* Federation: allow specification of dns zone by ID ([#36336](https://github.com/kubernetes/kubernetes/pull/36336), [@justinsb](https://github.com/justinsb))