注意默认值依然是 `None`，所以该参数仍是可选的。

但现在把 `Query(max_length=50)` 放到 `Annotated` 里，我们就在告诉 FastAPI，这个值需要**额外校验**，最大长度为 50 个字符。😎

/// tip | 提示

这里用的是 `Query()`，因为这是一个**查询参数**。稍后我们还会看到 `Path()`、`Body()`、`Header()` 和 `Cookie()`，它们也接受与 `Query()` 相同的参数。

///

FastAPI 现在会：

- 对数据进行**校验**，确保最大长度为 50 个字符
- 当数据无效时向客户端展示**清晰的错误**
- 在 OpenAPI 模式的*路径操作*中**记录**该参数（因此会出现在**自动文档 UI** 中）

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package bytes_test

import (
	. "bytes"
	"fmt"
	"internal/testenv"
	"io"
	"math/rand"
	"strconv"
	"testing"
	"unicode/utf8"
)

const N = 10000       // make this bigger for a larger (and slower) test
var testString string // test data for write tests

The way you use it is very simple. For example, to do a `GET` request, you would write:

```Python
response = requests.get("http://example.com/some/url")
```

The FastAPI counterpart API *path operation* could look like:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():
    return {"message": "Hello World"}
```

See the similarities in `requests.get(...)` and `@app.get(...)`.

pkg maps, func EqualFunc[$0 interface{ ~map[$2]$3 }, $1 interface{ ~map[$2]$4 }, $2 comparable, $3 interface{}, $4 interface{}]($0, $1, func($3, $4) bool) bool #57436
pkg math/big, method (*Int) Float64() (float64, Accuracy) #56984
pkg net/http, method (*ProtocolError) Is(error) bool #41198
pkg net/http, method (*ResponseController) EnableFullDuplex() error #57786

import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;
import static com.google.common.collect.Sets.newHashSet;
import static com.google.common.truth.Truth.assertThat;
import static java.lang.Math.min;
import static java.util.Arrays.asList;
import static java.util.Arrays.sort;
import static java.util.Collections.emptyList;

import com.google.common.annotations.GwtCompatible;

// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"math/rand"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/dustin/go-humanize"
	"github.com/minio/minio/internal/kms"
)

// Return pointer to testOneByteReadEOF{}

NewPublicKey65, }, { "Path/ML-DSA-65/2", "235A48DB4CA7916B884F", "1AC58A909DB4D7BC2473", "F8CE85CB2EC474FFBF5A", "AE9531A01738615B6D33", NewPrivateKey65, NewPublicKey65, }, { "Path/ML-DSA-65/3", "E13131B705A760305FEF", "B422093F95CC489C52F4", "CD365512C7E61BBAA130", "3C55E604DECA7B89A993", NewPrivateKey65, NewPublicKey65, }, { "Path/ML-DSA-65/4", "0A4793E040A4BC0D0F37", "622D26D536D4D66CD949", "6D9C7A795E48D80A892C", "3B141110B9F56540B2D4", NewPrivateKey65, NewPublicKey65, }, { "Path/ML-DSA-65/5", "F...

    *  - Created new GCE_SSH_KEY allowing specification of SSH keys for gce, gke, and kubemark.
    *  - AWS_SSH_KEY, previously assumed to be an absolute path can now be either relative or absolute

= getSpecialTransitionEndEvent()\n}\n\n/**\n * Public Util API\n */\n\nconst Util = {\n  TRANSITION_END: 'bsTransitionEnd',\n\n  getUID(prefix) {\n    do {\n      // eslint-disable-next-line no-bitwise\n      prefix += ~~(Math.random() * MAX_UID) // \"~~\" acts like a faster Math.floor() here\n    } while (document.getElementById(prefix))\n\n    return prefix\n  },\n\n  getSelectorFromElement(element) {\n    let selector = element.getAttribute('data-target')\n\n    if (!selector || selector === '#')...

                                                 TF_Status* status);

// Delete configuration key-value. If `key` is a directory, recursively clean up
// all key-values under the path specified by `key`.
TF_CAPI_EXPORT extern void TFE_DeleteConfigKeyValue(TFE_Context* ctx,
                                                    const char* key,
                                                    TF_Status* status);