{* ../../docs_src/body_nested_models/tutorial002.py hl[14] *}

## Tipo "set"


Mas então, quando nós pensamos mais, percebemos que as tags não devem se repetir, elas provavelmente devem ser strings únicas.

E que o Python tem um tipo de dados especial para conjuntos de itens únicos, o `set`.

Então podemos importar `Set` e declarar `tags` como um `set` de `str`s:

    private TestCondition(Lock lock, Condition condition) {
      this.lock = lock;
      this.condition = condition;
    }

    static TestCondition createAndSignalAfter(long delay, TimeUnit unit) {
      TestCondition testCondition = create();

      ScheduledExecutorService scheduledPool = newScheduledThreadPool(1);

```Python
item: Item
```

...dengan sekali deklarasi anda mendapatkan:

* Dukungan editor, termasuk:
    * Pelengkapan kode.
    * Pengecekan tipe.
* Validasi data:
    * Kesalahan otomatis dan jelas ketika data tidak sesuai.
    * Validasi hingga untuk object JSON bercabang mendalam.

                                localFailures = 0; // Reset on success
                            }

                            Thread.sleep(5); // Small delay to spread out requests
                        }
                        successfulThreads.incrementAndGet();
                    } catch (Exception e) {
                        exceptionCount.incrementAndGet();

        Thread.sleep(200);

        long laterAge = keyManager.getKeyAge(sessionId);
        assertTrue(laterAge >= 200, "Age should increase after delay");
    }

    @Test
    public void testKeyAgeNonExistent() {
        assertEquals(-1, keyManager.getKeyAge("non-existent"), "Non-existent key should return -1 for age");
    }

    @Test

* **Sem comprometer** os bancos de dados, _frontends_ etc. Mas fácil integração com todos eles.

### "Plug-ins" ilimitados

Ou, de outra forma, sem a necessidade deles, importe e use o código que precisar.

                    logger.debug("Interrupted.", e);
                }
            }
        }
    }

    /**
     * Sets the crawling execution interval.
     * This interval controls the delay between starting new crawler threads
     * and the frequency of status checks during crawling operations.
     *
     * @param crawlingExecutionInterval interval in milliseconds
     */

        // First read
        NbtAddress result = lmhosts.getByName("TESTHOST", mockContext);
        assertNotNull(result);

        // Modify file with a delay to ensure different lastModified time
        Thread.sleep(100);
        try (FileWriter writer = new FileWriter(lmhostsFile)) {
            writer.write("192.168.1.200 NEWHOST\n");
        }

  private void assertEvents(String... events) {
    assertEquals(Arrays.toString(events), stopwatch.readEventsAndClear());
  }

  /**
   * The stopwatch gathers events and presents them as strings. R0.6 means a delay of 0.6 seconds
   * caused by the (R)ateLimiter U1.0 means the (U)ser caused the stopwatch to sleep for a second.
   */
  static class FakeStopwatch extends SleepingStopwatch {
    long instant = 0L;

  private void assertEvents(String... events) {
    assertEquals(Arrays.toString(events), stopwatch.readEventsAndClear());
  }

  /**
   * The stopwatch gathers events and presents them as strings. R0.6 means a delay of 0.6 seconds
   * caused by the (R)ateLimiter U1.0 means the (U)ser caused the stopwatch to sleep for a second.
   */
  static class FakeStopwatch extends SleepingStopwatch {
    long instant = 0L;