from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


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


@app.post(
    "/items/",
    response_model=Item,
    summary="Create an item",

    return asList(
        getMethod(MultisetIteratorTester.class, "testIteratorKnownOrder"),
        getMethod(MultisetIteratorTester.class, "testIteratorUnknownOrder"),
        getMethod(MultisetIteratorTester.class, "testRemovingIteratorKnownOrder"),
        getMethod(MultisetIteratorTester.class, "testRemovingIteratorUnknownOrder"));
  }

    assertThrows(ConcurrentModificationException.class, () -> iterator.next());
  }

  @CollectionFeature.Require({SUPPORTS_ADD, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  public void testSetCountZeroToOneConcurrentWithEntrySetIteration() {
    Iterator<Entry<E>> iterator = getMultiset().entrySet().iterator();
    assertSetCount(e3(), 1);
    assertThrows(ConcurrentModificationException.class, () -> iterator.next());
  }

Existem diversas alternativas, incluindo:

* <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>: um servidor ASGI de alta performance.
* <a href="https://hypercorn.readthedocs.io/" class="external-link" target="_blank">Hypercorn</a>: um servidor ASGI compátivel com HTTP/2, Trio e outros recursos.
* <a href="https://github.com/django/daphne" class="external-link" target="_blank">Daphne</a>: servidor ASGI construído para Django Channels.

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<%-- query did not match any document --%>
<div id="result" class="row">
	<div class="col-md-8 alert">
		<la:message key="labels.did_not_match" arg0="${displayQuery}" />
	</div>
	<div class="col-md-4"><%-- Side Content --%></div>

    ExecutionException expected =
        assertThrows(ExecutionException.class, () -> getDone(immediateFailedFuture(failureCause)));
    assertThat(expected).hasCauseThat().isEqualTo(failureCause);
  }

  public void testCancelled() throws ExecutionException {
    assertThrows(CancellationException.class, () -> getDone(immediateCancelledFuture()));
  }

  public void testPending() throws ExecutionException {

# `APIRouter` class

Here's the reference information for the `APIRouter` class, with all its parameters, attributes and methods.

You can import the `APIRouter` class directly from `fastapi`:

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete

* <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank"><strong>Swagger UI</strong></a>، با <abbr title="interactive exploration">کاوش تعاملی</abbr>، API خود را مستقیما از طریق مرورگر صدازده و تست کنید.

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* مستندات API جایگزین با <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### 대안 API 문서

그리고 이제, <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>로 가봅니다.

대안 자동 문서를 볼 수 있습니다 (<a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a> 제공):

from fastapi import FastAPI, Path
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


@app.put("/items/{item_id}")
async def update_item(
    *,
    item_id: int = Path(title="The ID of the item to get", ge=0, le=1000),
    q: str | None = None,
    item: Item | None = None,
):