```
1 validation error
path -> item_id
  value is not a valid integer (type=type_error.integer)
```

#### `RequestValidationError` или `ValidationError`

!!! warning "Внимание"
    Это технические детали, которые можно пропустить, если они не важны для вас сейчас.

```Python hl_lines="2  14-16"
{!../../../docs_src/handling_errors/tutorial004.py!}
```

Wenn Sie nun `/items/foo` besuchen, erhalten Sie statt des Default-JSON-Errors:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

以下のようなテキスト版を取得します:

```
1 validation error
path -> item_id
  value is not a valid integer (type=type_error.integer)
```

#### `RequestValidationError`と`ValidationError`

!!! warning "注意"
    これらは今のあなたにとって重要でない場合は省略しても良い技術的な詳細です。

`RequestValidationError`はPydanticの<a href="https://docs.pydantic.dev/latest/concepts/models/#error-handling" class="external-link" target="_blank">`ValidationError`</a>のサブクラスです。

Os status codes na faixa dos 400 significam que houve um erro por parte do cliente.

Você se lembra de todos aqueles erros (e piadas) a respeito do "**404 Not Found**"?

## Use o `HTTPException`

Para retornar ao cliente *responses* HTTP com erros, use o `HTTPException`.

### Import `HTTPException`

```Python hl_lines="1"
{!../../../docs_src/handling_errors/tutorial001.py!}
```

package s3select

// /////////////////////////////////////////////////////////////////////
//
//	Validation errors.
//
// /////////////////////////////////////////////////////////////////////
func errExpressionTooLong(err error) *s3Error {
	return &s3Error{
		code:       "ExpressionTooLong",
		message:    "The SQL expression is too long: The maximum byte-length for the SQL expression is 256 KB.",

	return "Object name invalid: " + e.Bucket + "/" + e.Object
}

// Error returns string an error formatted as the given text.
func (e ObjectNameTooLong) Error() string {
	return "Object name too long: " + e.Bucket + "/" + e.Object
}

// Error returns string an error formatted as the given text.
func (e ObjectNamePrefixAsSlash) Error() string {

errors.property_type_float={0} should be numeric.
errors.property_type_double={0} should be numeric.
errors.property_type_date={0} should be date.

errors.storage_file_upload_failure=Failed to upload {0}.
errors.storage_file_not_found=The target file is not found in Storage.
errors.storage_file_download_failure=Failed to download {0}.
errors.storage_access_error=Storage access error: {0}

errors.target_file_does_not_exist={0} file does not exist.
errors.failed_to_delete_file=Failed to delete {0} file.
errors.docid_not_found=Not found Doc ID:{0}
errors.document_not_found=Not found URL of Doc ID:{0}
errors.not_load_from_server=Could not load from this server: {0}
errors.failed_to_start_job=Failed to start job {0}.
errors.failed_to_stop_job=Failed to stop job {0}.

            Errors.NO_RECEIVER_ALLOWED,
            Errors.ILLEGAL_SELECTOR,
            Errors.FUNCTION_EXPECTED,
            Errors.FUNCTION_CALL_EXPECTED,
            Errors.NO_CONSTRUCTOR,
            Errors.OVERLOAD_RESOLUTION_AMBIGUITY,
            Errors.NONE_APPLICABLE,
            Errors.CANNOT_COMPLETE_RESOLVE,
            Errors.UNRESOLVED_REFERENCE_WRONG_RECEIVER,

    assert "/async_raise" in errors
    errors.clear()


def test_async_raise_server_error():
    client = TestClient(app, raise_server_exceptions=False)
    response = client.get("/async_raise")
    assert response.status_code == 500, response.text
    assert state["/async_raise"] == "asyncgen raise finalized"
    assert "/async_raise" in errors
    errors.clear()


def test_context_b():