Logger                   logger.Interface
	NowFunc                  func() time.Time
	CreateBatchSize          int
}

// Open initialize db session based on dialector
func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
	config := &Config{}

	sort.Slice(opts, func(i, j int) bool {
		_, isConfig := opts[i].(*Config)
		_, isConfig2 := opts[j].(*Config)
		return isConfig && !isConfig2
	})

from fastapi import FastAPI, Path

app = FastAPI()


@app.get("/items/{item_id}")
async def read_items(
    *, item_id: int = Path(title="The ID of the item to get", ge=1), q: str
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

from fastapi import FastAPI, Path

app = FastAPI()


@app.get("/items/{item_id}")
async def read_items(
    *,
    item_id: int = Path(title="The ID of the item to get", gt=0, le=1000),
    q: str,
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

     *
     * @return the HTTP status code.
     */
    public int getHttpStatusCode() {
        return httpStatusCode;
    }

    /**
     * Sets the HTTP status code for the response.
     *
     * @param httpStatusCode the HTTP status code to set.
     */
    public void setHttpStatusCode(final int httpStatusCode) {
        this.httpStatusCode = httpStatusCode;
    }

    /**

}
```

當然，你可以同時定義部分參數為必填、部分有預設值、部分為選填：

{* ../../docs_src/query_params/tutorial006_py310.py hl[8] *}

在此例中，有 3 個查詢參數：

* `needy`，必填的 `str`。
* `skip`，具有預設值 `0` 的 `int`。
* `limit`，選填的 `int`。

/// tip | 提示

你也可以像在[路徑參數](path-params.md#predefined-values)中一樣使用 `Enum`。

	const input = "1234 5678 1234567901234567890"
	scanner := bufio.NewScanner(strings.NewReader(input))
	// Create a custom split function by wrapping the existing ScanWords function.
	split := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
		advance, token, err = bufio.ScanWords(data, atEOF)
		if err == nil && token != nil {
			_, err = strconv.ParseInt(string(token), 10, 32)
		}
		return
	}

                    }

                    final BoolQueryBuilder readingQueryBuilder = QueryBuilders.boolQuery().minimumShouldMatch(1);
                    final int readingNum = readingList.size();
                    for (int readingCount = 0; readingCount < readingNum; readingCount++) {
                        final String reading = readingList.get(readingCount);

func (p *ReplicationPool) ActiveWorkers() int {
	return int(atomic.LoadInt32(&p.activeWorkers))
}

// ActiveMRFWorkers returns the number of active workers handling replication failures.
func (p *ReplicationPool) ActiveMRFWorkers() int {
	return int(atomic.LoadInt32(&p.activeMRFWorkers))
}

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, item: Item = Body(embed=True)):
    results = {"item_id": item_id, "item": item}

class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: list[str] = []


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