* Затем она возвращает ответ `response`, сгенерированный *операцией пути*.
* Также имеется возможность видоизменить `response`, перед тем как его вернуть.

{* ../../docs_src/middleware/tutorial001_py39.py hl[8:9,11,14] *}

/// tip | Примечание

import importlib

import pytest
from fastapi.testclient import TestClient


@pytest.fixture(
    name="client",
    params=[
        "tutorial011_py39",
        pytest.param("tutorial011_an_py39"),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.dependencies.{request.param}")

    client = TestClient(mod.app)
    return client


@pytest.mark.parametrize(

Нужно импортировать `WSGIMiddleware`.

Затем оберните WSGI‑приложение (например, Flask) в middleware (Промежуточный слой).

После этого смонтируйте его на путь.

{* ../../docs_src/wsgi/tutorial001_py39.py hl[2:3,3] *}

## Проверьте { #check-it }

Теперь каждый HTTP‑запрос по пути `/v1/` будет обрабатываться приложением Flask.

А всё остальное будет обрабатываться **FastAPI**.

import pytest
from fastapi.testclient import TestClient

from docs_src.path_operation_configuration.tutorial006_py39 import app

client = TestClient(app)


@pytest.mark.parametrize(
    "path,expected_status,expected_response",
    [
        ("/items/", 200, [{"name": "Foo", "price": 42}]),
        ("/users/", 200, [{"username": "johndoe"}]),
        ("/elements/", 200, [{"item_id": "Foo"}]),
    ],
)

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(
        f"docs_src.path_operation_advanced_configuration.{request.param}"

from fastapi.testclient import TestClient

from docs_src.extending_openapi.tutorial001_py39 import app

client = TestClient(app)


def test():
    response = client.get("/items/")
    assert response.status_code == 200, response.text
    assert response.json() == [{"name": "Foo"}]


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
        pytest.param("tutorial004_an_py39"),
        pytest.param("tutorial004_an_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):

Você precisa importar o `WSGIMiddleware`.

Em seguida, encapsule a aplicação WSGI (e.g. Flask) com o middleware.

E então monte isso sob um path.

{* ../../docs_src/wsgi/tutorial001_py39.py hl[2:3,3] *}

## Confira { #check-it }

Agora, todas as requisições sob o path `/v1/` serão manipuladas pela aplicação Flask.

E o resto será manipulado pelo **FastAPI**.

from fastapi.testclient import TestClient

from docs_src.path_params.tutorial002_py39 import app

client = TestClient(app)


def test_get_items():
    response = client.get("/items/1")
    assert response.status_code == 200, response.text
    assert response.json() == {"item_id": 1}


def test_get_items_invalid_id():
    response = client.get("/items/item1")
    assert response.status_code == 422, response.text

from fastapi.testclient import TestClient

from docs_src.cors.tutorial001_py39 import app


def test_cors():
    client = TestClient(app)
    # Test pre-flight response
    headers = {
        "Origin": "https://localhost.tiangolo.com",
        "Access-Control-Request-Method": "GET",
        "Access-Control-Request-Headers": "X-Example",
    }
    response = client.options("/", headers=headers)