await websocket.send_json(
        {"func_is_open": function_session.open, "req_is_open": request_session.open}
    )


@app.websocket("/sub")
async def get_sub(websocket: WebSocket, sessions: NamedSessionsDep) -> Any:
    await websocket.accept()
    await websocket.send_json(
        {"named_session_open": sessions[0].open, "session_open": sessions[1].open}
    )


@app.websocket("/named-function-scope")

from fastapi.testclient import TestClient


class Session:
    def __init__(self) -> None:
        self.data = ["foo", "bar", "baz"]
        self.open = True

    def __iter__(self) -> Generator[str, None, None]:
        for item in self.data:
            if self.open:
                yield item
            else:
                raise ValueError("Session closed")


@contextmanager

        yield json.dumps(
            {"func_is_open": function_session.open, "req_is_open": request_session.open}
        )

    return StreamingResponse(iter_data())


@app.get("/sub")
def get_sub(sessions: NamedSessionsDep) -> Any:
    def iter_data():
        yield json.dumps(
            {"named_session_open": sessions[0].open, "session_open": sessions[1].open}
        )

    return StreamingResponse(iter_data())

    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

    client = TestClient(app)
    with path.open("rb") as file, path2.open("rb") as file2:
        response = client.post(
            "/files/",
            files=(
                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),

                "input": None,
            }
        ]
    }


def test_post_file(tmp_path, client: TestClient):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")

    with path.open("rb") as file:
        response = client.post("/files/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"file_size": 14}

{* ../../docs_src/events/tutorial003_py39.py hl[1,13] *}

A **context manager** in Python is something that you can use in a `with` statement, for example, `open()` can be used as a context manager:

```Python
with open("file.txt") as file:
    file.read()
```

In recent versions of Python, there's also an **async context manager**. You would use it with `async with`:

```Python

{* ../../docs_src/events/tutorial003_py39.py hl[1,13] *}

Um **gerenciador de contexto** em Python é algo que você pode usar em uma declaração `with`, por exemplo, `open()` pode ser usado como um gerenciador de contexto:

```Python
with open("file.txt") as file:
    file.read()
```

Em versões mais recentes do Python, há também um **gerenciador de contexto assíncrono**. Você o usaria com `async with`:

```Python

from fastapi.testclient import TestClient


class Session:
    def __init__(self) -> None:
        self.data = ["foo", "bar", "baz"]
        self.open = True

    def __iter__(self) -> Generator[str, None, None]:
        for item in self.data:
            if self.open:
                yield item
            else:
                raise ValueError("Session closed")


@contextmanager

    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

    client = TestClient(app)
    with path.open("rb") as file, path2.open("rb") as file2:
        response = client.post(
            "/files/",
            files=(
                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),

* Replicação, com dimensionamento automático baseado em requests
* etc.

O FastAPI Cloud é o patrocinador principal e provedor de financiamento dos projetos open source do ecossistema *FastAPI and friends*. ✨

## Implantar em outros provedores de nuvem { #deploy-to-other-cloud-providers }

FastAPI é open source e baseado em padrões. Você pode implantar aplicações FastAPI em qualquer provedor de nuvem que escolher.