```

</div>

Si creas un app como:

```Python hl_lines="3"
{!../../docs_src/first_steps/tutorial002.py!}
```

y lo guardas en un archivo `main.py`, entonces ejecutarías `uvicorn` así:

<div class="termy">

```console
$ uvicorn main:my_awesome_api --reload

   * network interceptors return.
   */
  internal var interceptorScopedExchange: Exchange? = null
    private set

  // These properties are guarded by [lock]. They are typically only accessed by the thread executing
  // the call, but they may be accessed by other threads for duplex requests.

  /** True if this call still has a request body open. */

    assertEquals(originalCount, originalMap.size());
    assertEquals(originalMap, map);

    for (int i = 1; i <= originalCount * 2; i *= 2) {
      if (i > 1) {
        // TODO(b/145386688): This access should be guarded by 'segment', which is not currently
        // held
        segment.expand();
      }
      assertEquals(i, segment.table.length());
      assertEquals(originalCount, countLiveEntries(map));

    assertEquals(originalCount, originalMap.size());
    assertEquals(originalMap, map);

    for (int i = 1; i <= originalCount * 2; i *= 2) {
      if (i > 1) {
        // TODO(b/145386688): This access should be guarded by 'segment', which is not currently
        // held
        segment.expand();
      }
      assertEquals(i, segment.table.length());
      assertEquals(originalCount, countLiveEntries(map));

TensorFlow coding style.

#### General guidelines and philosophy for contribution

*   Include unit tests when you contribute new features, as they help to a)
    prove that your code works correctly, and b) guard against future breaking
    changes to lower the maintenance cost.
*   Bug fixes also generally require unit tests, because the presence of bugs
    usually indicates insufficient test coverage.

          return 0
        }
      }

    /**
     * Holds interned instances. This needs to be above the init() calls below so that it's
     * initialized by the time those parts of `<clinit>()` run. Guarded by CipherSuite.class.
     */
    private val INSTANCES = mutableMapOf<String, CipherSuite>()

    // Last updated 2016-07-03 using cipher suites from Android 24 and Java 9.

    if (!returnType.isSupertypeOf(getReturnType())) {
      throw new IllegalArgumentException(
          "Invokable is known to return " + getReturnType() + ", not " + returnType);
    }
    @SuppressWarnings("unchecked") // guarded by previous check
    Invokable<T, R1> specialized = (Invokable<T, R1>) this;
    return specialized;
  }

  @SuppressWarnings("unchecked") // The declaring class is T's raw class, or one of its supertypes.

- we also seem to have artifact information tangled inside the plugin model
- we have to deal with scripting implementations (groovy, beanshell, ruby)
- we need to deal with a shared context for plugins, like the guarded mojos
- we need to deal with plugins as core application logic which can also interact with plugins

* Along with this comes the testing strategies that make this work

  private var writerTask: Task? = null

  /** Null until this web socket is connected. Only accessed by the reader thread. */
  private var reader: WebSocketReader? = null

  // All mutable web socket state is guarded by this.

  /** Null until this web socket is connected. Note that messages may be enqueued before that. */
  private var writer: WebSocketWriter? = null

  /** Used for writes, pings, and close timeouts. */

```

</div>

Como variáveis de ambiente podem ser definidas fora do código da aplicação, mas acessadas pela aplicação, e não precisam ser armazenadas (versionadas com `git`) junto dos outros arquivos, é comum utilizá-las para guardar configurações.

Você também pode criar uma variável de ambiente específica para uma invocação de um programa, que é acessível somente para esse programa, e somente enquanto ele estiver executando.