## エイリアスパラメータ { #alias-parameters }

パラメータに`item-query`を指定するとします.

以下のような感じです:

```
http://127.0.0.1:8000/items/?item-query=foobaritems
```

しかし、`item-query`は有効なPythonの変数名ではありません。

最も近いのは`item_query`でしょう。

しかし、どうしても`item-query`と正確に一致している必要があるとします...

それならば、`alias`を宣言することができます。エイリアスはパラメータの値を見つけるのに使用されます:

This PR will be imported into Gerrit with the title and first
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**Please ensure you adhere to every item in this list.**

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+ The PR title is formatted as follows: `net/http: frob the quux before blarfing`
  + The package name goes before the colon

@app.get("/stream-raw", response_class=StreamingResponse)
async def stream_raw() -> AsyncIterable[str]:
    """Async generator with no internal await - would hang without checkpoint."""
    i = 0
    while True:
        yield f"item {i}\n"
        i += 1


@app.get("/stream-jsonl")
async def stream_jsonl() -> AsyncIterable[int]:
    """JSONL async generator with no internal await."""
    i = 0
    while True:
        yield i

	s.tr = append(s.tr, tr)
}

func (s *Stack) Next() ScanToken {
	tos := s.tr[len(s.tr)-1]
	tok := tos.Next()
	for tok == scanner.EOF && len(s.tr) > 1 {
		tos.Close()
		// Pop the topmost item from the stack and resume with the next one down.
		s.tr = s.tr[:len(s.tr)-1]
		tok = s.Next()
	}
	return tok
}

func (s *Stack) Text() string {
	return s.tr[len(s.tr)-1].Text()
}

        urlQueue.setMethod("GET");
        urlQueue.setSessionId(sessionId);
        urlQueue.setUrl("http://www.example.com/page1");

        urlQueueService.insert(urlQueue);

        // Poll should return the item
        final OpenSearchUrlQueue polled = urlQueueService.poll(sessionId);
        assertNotNull(polled);
        assertEquals("http://www.example.com/page1", polled.getUrl());

                            {"OAuth2AuthorizationCodeBearer": ["read"]},
                        ],
                    },
                    "post": {
                        "summary": "Create Item",
                        "operationId": "create_item_items__post",
                        "responses": {
                            "200": {
                                "description": "Successful Response",

	for len(r.current) <= r.recordsRead {
		if r.err != nil {
			return nil, r.err
		}
		// Move to next block
		item, ok := <-r.queue
		if !ok {
			r.err = io.EOF
			return nil, r.err
		}

		r.csvDstPool.Put(r.current)
		r.current = <-item.dst
		r.err = item.err
		r.recordsRead = 0
	}
	csvRecord := r.current[r.recordsRead]
	r.recordsRead++

	// If no column names are set, use _(index)

///

### `yield from` { #yield-from }

When you are iterating over something, like a file-like object, and then you are doing `yield` for each item, you could also use `yield from` to yield each item directly and skip the `for` loop.

This is not particular to FastAPI, it's just Python, but it's a nice trick to know. 😎

{* ../../docs_src/generate_clients/tutorial001_py310.py hl[7:9,12:13,16:17,21] *}

Notice that the *path operations* define the models they use for request payload and response payload, using the models `Item` and `ResponseMessage`.

### API Docs { #api-docs }

If you go to `/docs`, you will see that it has the **schemas** for the data to be sent in requests and received in responses:

        assertEquals(expected.length, actual.size(), "Collection size mismatch");
        for (T item : expected) {
            assertTrue(actual.contains(item), "Collection should contain: " + item);
        }
    }

    @Test
    void testPerformProfileActivation() throws ParseException {
        final CommandLineParser parser = new DefaultParser();