*   TF Core:

    *   `tf.Graph.get_name_scope()` now always returns a string, as documented.
        Previously, when called within `name_scope("")` or `name_scope(None)`
        contexts, it returned `None`; now it returns the empty string.
    *   `tensorflow/core/ir/` contains a new MLIR-based Graph dialect that is
        isomorphic to GraphDef and will be used to replace GraphDef-based (e.g.,

```Python hl_lines="10"
{!> ../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

////

/// note

A path parameter is always required as it has to be part of the path. Even if you declared it with `None` or set a default value, it would not affect anything, it would still be always required.

///

## Order the parameters as you need

/// 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.

Als je dit niet meegeeft, is de standaardwaarde `None`. In dit geval gebruiken we standaard `"World"`.

///

Dan zou je dat Python-programma kunnen aanroepen:

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

<div class="termy">

```console

   * method.
   */
  public void callAndAssertWaits(String methodName, Object conditionLikeObject) throws Exception {
    checkNotNull(methodName);
    checkNotNull(conditionLikeObject);
    // TODO: Restore the following line when Monitor.hasWaiters() no longer acquires the lock.
    // assertEquals(false, invokeMethod("hasWaiters", conditionLikeObject));
    sendRequest(methodName, conditionLikeObject);
    Thread.sleep(DUE_DILIGENCE_MILLIS);

          }
          else -> throw AssertionError("unsupported hashAlgorithm: ${pin.hashAlgorithm}")
        }
      }
    }

    // If we couldn't find a matching pin, format a nice exception.
    val message =
      buildString {
        append("Certificate pinning failure!")
        append("\n  Peer certificate chain:")
        for (element in peerCertificates) {
          append("\n    ")

    - "sidecar.istio.io/status" annotation is not present on the pod (created by injection of sidecar)
    - pod label "istio.io/dataplane-mode" is not "none"
- sidecar interception is enabled if:
    - "istio-init" container is not present in the pod.
    - istio-proxy container exists and
        - does not have DISABLE_ENVOY environment variable (which triggers proxyless mode)

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):

    SerializableTester.reserializeAndAssert(Doubles.stringConverter());
  }

  public void testToArray() {
    // need explicit type parameter to avoid javac warning!?
    List<Double> none = Arrays.<Double>asList();
    assertThat(Doubles.toArray(none)).isEqualTo(EMPTY);

    List<Double> one = Arrays.asList((double) 1);
    assertThat(Doubles.toArray(one)).isEqualTo(ARRAY1);

    double[] array = {(double) 0, (double) 1, Math.PI};

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Unit tests on <code>MavenProperties</code>.
 */
public class MavenPropertiesTest {

    private static final String LINE_SEPARATOR = System.getProperty("line.separator");
    private static final String COMMENT = "# comment";
    private static final String KEY1 = "mvn:foo/bar";
    private static final String KEY1A = "mvn\\:foo/bar";

		// and also skip traces with function name that starts with "runtime."
		if !strings.HasPrefix(file, "<autogenerated>") &&
			!strings.HasPrefix(funcName, "runtime.") {
			// Form and append a line of stack trace into a
			// collection, 'trace', to build full stack trace
			trace = append(trace, fmt.Sprintf("%v:%v:%v()", file, lineNumber, funcName))

			// Ignore trace logs beyond the following conditions