"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}

    patha = tmp_path / "test.txt"
    pathb = tmp_path / "testb.txt"
    patha.write_text("<file content>")
    pathb.write_text("<file b content>")

    client = TestClient(app)
    with patha.open("rb") as filea, pathb.open("rb") as fileb:
        response = client.post(
            "/files/",
            data={"token": "foo"},
            files={"file": filea, "fileb": ("testb.txt", fileb, "text/plain")},
        )

    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)),
            ),

{* ../../docs_src/schema_extra_example/tutorial003_an_py310.py hl[22:29] *}

### Beispiel in der Dokumentations-Benutzeroberfläche { #example-in-the-docs-ui }

Mit jeder der oben genannten Methoden würde es in `/docs` so aussehen:

<img src="/img/tutorial/body-fields/image01.png">

### `Body` mit mehreren `examples` { #body-with-multiple-examples }

FastAPI Cloud is the primary sponsor and funding provider for the *FastAPI and friends* open source projects. ✨

#### Deploy to other cloud providers

FastAPI is open source and based on standards. You can deploy FastAPI apps to any cloud provider you choose.

Follow your cloud provider's guides to deploy FastAPI apps with them. 🤓

    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}


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

    with path.open("rb") as file:

# Without aliases


@app.post("/optional-list-bytes")
async def read_optional_list_bytes(p: Annotated[Optional[list[bytes]], File()] = None):
    return {"file_size": [len(file) for file in p] if p else None}


@app.post("/optional-list-uploadfile")
async def read_optional_list_uploadfile(
    p: Annotated[Optional[list[UploadFile]], File()] = None,
):

Sie können `dataclasses` mit anderen Typannotationen auf vielfältige Weise kombinieren, um komplexe Datenstrukturen zu bilden.

Weitere Einzelheiten finden Sie in den Bemerkungen im Quellcode oben.

## Mehr erfahren { #learn-more }

Sie können `dataclasses` auch mit anderen Pydantic-Modellen kombinieren, von ihnen erben, sie in Ihre eigenen Modelle einbinden, usw.

FastAPI Cloud ist der Hauptsponsor und Finanzierer der *FastAPI and friends* Open-Source-Projekte. ✨

#### Bei anderen Cloudanbietern deployen { #deploy-to-other-cloud-providers }

FastAPI ist Open Source und basiert auf Standards. Sie können FastAPI-Apps bei jedem Cloudanbieter Ihrer Wahl deployen.

FastAPI Cloud is the primary sponsor and funding provider for the *FastAPI and friends* open source projects. ✨

#### Deploy to other cloud providers { #deploy-to-other-cloud-providers }

FastAPI is open source and based on standards. You can deploy FastAPI apps to any cloud provider you choose.

Follow your cloud provider's guides to deploy FastAPI apps with them. 🤓