<img src="/img/python-types/image03.png">

## More motivation { #more-motivation }

Check this function, it already has type hints:

{* ../../docs_src/python_types/tutorial003.py hl[1] *}

Because the editor knows the types of the variables, you don't only get completion, you also get error checks:

<img src="/img/python-types/image04.png">

 *
 * Supported on Android 2.3+ and OpenJDK 7+. There are no public APIs to recover the trust
 * manager that was used to create an [SSLSocketFactory].
 *
 * Not supported by choice on JDK9+ due to access checks.
 *
 * ### Android Cleartext Permit Detection
 *
 * Supported on Android 6.0+ via `NetworkSecurityPolicy`.
 */
open class Platform {
  /** Prefix used on custom headers. */
  fun getPrefix() = "OkHttp"

     *
     * @throws UnknownHostException
     *             if the host cannot be resolved to find out.
     */
    boolean isGroupAddress(CIFSContext tc) throws UnknownHostException;

    /**
     * Checks the node type of this address.
     *
     * @param tc
     *            context to use
     * @return {@link jcifs.netbios.NbtAddress#B_NODE},

        // Test that ChannelManager initializes properly
        assertNotNull(channelManager);
        assertNotNull(channelManager.getChannels());
        // Note: isUseMultiChannel() checks if actual multi-channel is negotiated with server
        // In mock environment, this will be false until we mock successful negotiation

        // Verify load balancer is initialized

		if pe != checkPartSuccess {
			c++
		}
	}
	return
}

// checkObjectWithAllParts sets partsMetadata and onlineDisks when xl.meta is inexistant/corrupted or outdated
// it also checks if the status of each part (corrupted, missing, ok) in each drive
func checkObjectWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetadata []FileInfo,

    } catch (TimeoutException expected) {
    } finally {
      latch.countDown();
    }
  }

  /**
   * Tests that a canceled future throws a cancellation exception.
   *
   * <p>This method checks the cancel, isCancelled, and isDone methods.
   */
  public void testCanceledFutureThrowsCancellation() throws Exception {

    assertFalse(future.isDone());
    assertFalse(future.isCancelled());

        } else {
            ret.append(Hexdump.toHexString(signingKey, 0, signingKey.length * 2));
        }
        ret.append("]");
        return ret.toString();
    }

    /**
     * Checks whether the security context is established.
     * @return true if the context is established, false otherwise
     */
    public boolean isEstablished() {
        return isEstablished;
    }

    /**

    bus.post(EVENT);
    bus.post(objEvent);
    bus.post(compEvent);

    // Check the StringCatcher...
    List<String> stringEvents = stringCatcher.getEvents();
    assertEquals("Only one String should be delivered.", 1, stringEvents.size());
    assertEquals("Correct string should be delivered.", EVENT, stringEvents.get(0));

    // Check the Catcher<Object>...

func TestStartProfiler(t *testing.T) {
	_, err := startProfiler("")
	if err == nil {
		t.Fatal("Expected a non nil error, but nil error returned for invalid profiler.")
	}
}

// checkURL - checks if passed address correspond
func checkURL(urlStr string) (*url.URL, error) {
	if urlStr == "" {
		return nil, errors.New("Address cannot be empty")
	}
	u, err := url.Parse(urlStr)
	if err != nil {

 * ACE and <i>any</i> of the desired access bits match bits in the access
 * mask of the ACE, the whole access check fails. If the ACE is an "allow"
 * ACE and <i>all</i> of the bits in the desired access bits match bits in
 * the access mask of the ACE, the access check is successful. Otherwise,
 * more ACEs are evaluated until all desired access bits (combined)