@Override
              public ListenableFuture<@Nullable Void> call() {
                return settableFuture;
              }
            },
            directExecutor());
    for (int i = 0; i < 25_000; i++) {
      serializer.submit(Callables.<Void>returning(null), directExecutor()).cancel(true);
      unused = serializer.submit(Callables.<Void>returning(null), directExecutor());
    }

=== "Python 3.9 and above"

    ```Python hl_lines="19-27"
    {!> ../../../docs_src/path_operation_configuration/tutorial004_py39.py!}
    ```

=== "Python 3.10 and above"

    ```Python hl_lines="17-25"
    {!> ../../../docs_src/path_operation_configuration/tutorial004_py310.py!}
    ```

Ela será usada nas documentações interativas:


<img src="/img/tutorial/path-operation-configuration/image02.png">

=== "Python 3.10+"

    ```Python hl_lines="17-25"
    {!> ../../../docs_src/path_operation_configuration/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="19-27"

 *
 *  * Control characters and non-ASCII characters are percent-encoded.
 *
 *  * All other characters are copied without transformation.
 *
 * @param alreadyEncoded true to leave '%' as-is; false to convert it to '%25'.
 * @param strict true to encode '%' if it is not the prefix of a valid percent encoding.
 * @param plusIsSpace true to encode '+' as "%2B" if it is not already encoded.

=== "Python 3.10+"

    ```Python hl_lines="17-25"
    {!> ../../../docs_src/path_operation_configuration/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="19-27"

Here, this section would run directly, right before starting your **FastAPI** application.

* Create an `engine`.
* Create all the tables from the `metadata` object.

```Python hl_lines="25-28"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

## Create models

Create Pydantic models for:

* Notes to be created (`NoteIn`).
* Notes to be returned (`Note`).

=== "Python 3.10+"

    ```Python hl_lines="17-25"
    {!> ../../../docs_src/path_operation_configuration/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="19-27"

    for (i in 0..2) {
      // Send frames of summing to size 50, which is windowUpdateThreshold.
      peer.sendFrame().data(false, 3, data(24), 24)
      peer.sendFrame().data(false, 3, data(25), 25)
      peer.sendFrame().data(false, 3, data(1), 1)
      peer.acceptFrame() // connection WINDOW UPDATE
      peer.acceptFrame() // stream WINDOW UPDATE
    }
    peer.sendFrame().data(true, 3, data(0), 0)

    rangeMap.putCoalescing(Range.closedOpen(17, 20), 3); // enclosing

    rangeMap.putCoalescing(Range.closedOpen(22, 23), 4); // disconnected
    rangeMap.putCoalescing(Range.closedOpen(23, 25), 4); // greater than minimum

    // {[-6..-4): 0, [0..1): 1, [1..5): 1, [7..9): 2,
    //  [9..14): 0, [14..15): 2, [17..20): 3, [22..25): 4}
    assertEquals(
        new ImmutableMap.Builder<>()

    ```

=== "Python 3.8+ Pydantic v2"

    ```Python hl_lines="15-26"
    {!> ../../../docs_src/schema_extra_example/tutorial001.py!}
    ```

=== "Python 3.8+ Pydantic v1"

    ```Python hl_lines="15-25"
    {!> ../../../docs_src/schema_extra_example/tutorial001_pv1.py!}
    ```

추가 정보는 있는 그대로 해당 모델의 **JSON 스키마** 결과에 추가되고, API 문서에서 사용합니다.

=== "Pydantic v2"