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docs_src/schema_extra_example/tutorial001_pv1_py39.py

from typing import Union

from fastapi import FastAPI
from pydantic.v1 import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None

    class Config:
        schema_extra = {
            "examples": [
                {
                    "name": "Foo",
                    "description": "A very nice Item",

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat Dec 20 15:55:38 GMT 2025

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github.com/tiangolo/fastapi

docs_src/schema_extra_example/tutorial003_an_py39.py

from typing import Annotated, Union

from fastapi import Body, FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None


@app.put("/items/{item_id}")
async def update_item(
    item_id: int,
    item: Annotated[
        Item,
        Body(
            examples=[
                {

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Fri Jun 30 18:25:16 GMT 2023

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github.com/minio/minio

helm-releases/minio-3.1.3.tgz

policy/v1beta1 kind: PodDisruptionBudget metadata: name: minio labels: app: {{ template "minio.name" . }} spec: maxUnavailable: {{ .Values.podDisruptionBudget.maxUnavailable }} selector: matchLabels: app: {{ template "minio.name" . }} {{- end }} minio/templates/post-install-create-bucket-job.yaml {{- if .Values.buckets }} apiVersion: batch/v1 kind: Job metadata: name: {{ template "minio.fullname" . }}-make-bucket-job labels: app: {{ template "minio.name" . }}-make-bucket-job chart: {{ template "minio.chart"...

Created: Sun Dec 28 19:28:13 GMT 2025

- Last Modified: Sat Sep 18 18:09:59 GMT 2021

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github.com/tiangolo/fastapi

docs/de/docs/advanced/middleware.md

```Python
from unicorn import UnicornMiddleware

app = SomeASGIApp()

new_app = UnicornMiddleware(app, some_config="rainbow")
```

Aber FastAPI (eigentlich Starlette) bietet eine einfachere Möglichkeit, welche sicherstellt, dass die internen Middlewares zur Behandlung von Serverfehlern und benutzerdefinierten Exceptionhandlern ordnungsgemäß funktionieren.

Dazu verwenden Sie `app.add_middleware()` (wie schon im Beispiel für CORS gesehen).

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Wed Dec 17 20:41:43 GMT 2025

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github.com/tiangolo/fastapi

docs/en/docs/reference/status.md

Read more about it in the [FastAPI docs about Response Status Code](https://fastapi.tiangolo.com/tutorial/response-status-code/).

## Example

```python
from fastapi import FastAPI, status

app = FastAPI()


@app.get("/items/", status_code=status.HTTP_418_IM_A_TEAPOT)

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Thu Apr 18 19:53:19 GMT 2024

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github.com/tiangolo/fastapi

docs_src/body_fields/tutorial001_py310.py

from fastapi import Body, FastAPI
from pydantic import BaseModel, Field

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = Field(
        default=None, title="The description of the item", max_length=300
    )
    price: float = Field(gt=0, description="The price must be greater than zero")
    tax: float | None = None


@app.put("/items/{item_id}")

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Fri May 13 23:38:22 GMT 2022

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github.com/tiangolo/fastapi

docs_src/dependencies/tutorial006_py39.py

app = FastAPI()


async def verify_token(x_token: str = Header()):
    if x_token != "fake-super-secret-token":
        raise HTTPException(status_code=400, detail="X-Token header invalid")


async def verify_key(x_key: str = Header()):
    if x_key != "fake-super-secret-key":
        raise HTTPException(status_code=400, detail="X-Key header invalid")
    return x_key

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Wed Dec 17 20:41:43 GMT 2025

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github.com/tiangolo/fastapi

tests/test_tutorial/test_custom_response/test_tutorial006c.py

from fastapi.testclient import TestClient

from docs_src.custom_response.tutorial006c_py39 import app

client = TestClient(app)


def test_redirect_status_code():
    response = client.get("/pydantic", follow_redirects=False)
    assert response.status_code == 302
    assert response.headers["location"] == "https://docs.pydantic.dev/"


def test_openapi_schema():
    response = client.get("/openapi.json")

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Wed Dec 17 20:41:43 GMT 2025

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github.com/tiangolo/fastapi

tests/test_tutorial/test_path_operation_advanced_configurations/test_tutorial005.py

from fastapi.testclient import TestClient

from docs_src.path_operation_advanced_configuration.tutorial005_py39 import app

client = TestClient(app)


def test_get():
    response = client.get("/items/")
    assert response.status_code == 200, response.text


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

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Wed Dec 17 20:41:43 GMT 2025

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github.com/tiangolo/fastapi

docs_src/websockets/tutorial002_py39.py

from typing import Union

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Wed Dec 17 20:41:43 GMT 2025

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