🔠 👈 📨 `dict`Ⓜ 💪 ✔️ 🔑 `model`, ⚗ Pydantic 🏷, 💖 `response_model`.

**FastAPI** 🔜 ✊ 👈 🏷, 🏗 🚮 🎻 🔗 & 🔌 ⚫️ ☑ 🥉 🗄.

🖼, 📣 ➕1️⃣ 📨 ⏮️ 👔 📟 `404` & Pydantic 🏷 `Message`, 👆 💪 ✍:

```Python hl_lines="18  22"
{!../../../docs_src/additional_responses/tutorial001.py!}
```

!!! note
    ✔️ 🤯 👈 👆 ✔️ 📨 `JSONResponse` 🔗.

!!! info

"^(?:^[ay]*[bx]+c)"
-;-;-;-
-;0-3;-;0-3
"(?:^[ay]*[bx]+c)$"
-;-;-;-
-;-;-;-
strings
""
"aabcdef"
regexps
"^[ay]*[bx]+c"
-;-;-;-
-;0-4;-;0-4
"^(?:^[ay]*[bx]+c)$"
-;-;-;-
-;-;-;-
"^(?:^[ay]*[bx]+c)"
-;-;-;-
-;0-4;-;0-4
"(?:^[ay]*[bx]+c)$"
-;-;-;-
-;-;-;-
strings
""
"abcdef"
regexps
"def$"
-;-;-;-
-;3-6;-;3-6
"^(?:def$)$"
-;-;-;-

apiVersion: release-notes/v2
kind: bug-fix
area: traffic-management
issues:
- 40474
releaseNotes:
- |
  **Fixed** an issue causing traffic to not match (and return a `404`) when using wildcard domain names and including an unexpected port in the `Host` header.
- |
  **Fixed** an issue causing traffic to match an unexpected route when using wildcard domain names and including an port in the `Host` header.
- |

        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

00000160  89 63 f4 38 18 e6 70 42  66 be f2 ec d9 85 88 ad  |.c.8..pBf.......|
00000170  59 c7 d1 57 3c 52 70 4a  d4 db c8 b4 2c 37 7b 61  |Y..W<RpJ....,7{a|
00000180  a9 4f 6a 4f 4a 64 04 7a  61 2b 01 f3 eb f0 c9 6a  |.OjOJd.za+.....j|
00000190  65 9f 67 e2 94 16 66 5f  4c 62 e8 17 38 18 17 0a  |e.g...f_Lb..8...|
000001a0  e2 bc 75 cf 32 71 a2 ab  ae 2f 61 c9 a1 fa 59 1f  |..u.2q.../a...Y.|

@app.get("/items/{item_id}")
def get_item(item_id: str, username: str = Depends(get_username)):
    if item_id not in data:
        raise HTTPException(status_code=404, detail="Item not found")
    item = data[item_id]
    if item["owner"] != username:
        raise OwnerError(username)

        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

@app.get("/items/{item_id}")
def get_item(item_id: str, username: Annotated[str, Depends(get_username)]):
    if item_id not in data:
        raise HTTPException(status_code=404, detail="Item not found")
    item = data[item_id]
    if item["owner"] != username:
        raise OwnerError(username)

    client = TestClient(app)
    return client


def test_get_no_item(client: TestClient):
    response = client.get("/items/foo")
    assert response.status_code == 404, response.text
    assert response.json() == {"detail": "Item not found, there's only a plumbus here"}


def test_get(client: TestClient):
    response = client.get("/items/plumbus")

def test_items_bar_token_jessica(client: TestClient):
    response = client.get(
        "/items/bar?token=jessica", headers={"X-Token": "fake-super-secret-token"}
    )
    assert response.status_code == 404
    assert response.json() == {"detail": "Item not found"}


def test_items_plumbus_with_no_token(client: TestClient):
    response = client.get(