from typing import Union

from fastapi import FastAPI, Path
from pydantic import BaseModel
from typing_extensions import Annotated

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: Annotated[int, Path(title="The ID of the item to get", ge=0, le=1000)],

something(some_argument, some_keyword_argument="foo")
```

这就是 "可调用对象"。

## 类作为依赖项

您可能会注意到，要创建一个 Python 类的实例，您可以使用相同的语法。

举个例子:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

在这个例子中, `fluffy` 是一个 `Cat` 类的实例。

为了创建 `fluffy`，你调用了 `Cat` 。

所以，Python 类也是 **可调用对象**。

因此，在 **FastAPI** 中，你可以使用一个 Python 类作为一个依赖项。

    private static final String LIST_ENDPOINT_SUFFIX = "settings";
    private static final String ITEM_ENDPOINT_SUFFIX = "setting";

    private static final String KEY_PROPERTY = "name";

    @Override
    protected String getNamePrefix() {
        return NAME_PREFIX;
    }

    @Override
    protected String getApiPath() {
        return API_PATH;
    }

    @Override

 * @author Shunji Makino
 * @author Keiichi Watanabe
 */
public class CreateForm {

    @ValidateTypeFailure
    public Integer crudMode;

    @Required
    @Size(max = 100)
    public String name;

    @Required
    @Size(max = 100)
    @Pattern(regexp = "^[a-zA-Z0-9_]+$")
    public String value;

    @CustomSize(maxKey = "form.admin.max.input.size")
    public String includedPaths;

/**
 * @author shinsuke
 */
public class CreateForm {

    @ValidateTypeFailure
    public Integer crudMode;

    @Required
    @Size(max = 100)
    public String name;

    @Required
    @Size(max = 100)
    public String target;

    @Size(max = 100)
    @CronExpression
    public String cronExpression;

    @Required
    @Size(max = 100)

 */
@Beta
@GwtCompatible
public enum PublicSuffixType {

  /** Public suffix that is provided by a private company, e.g. "blogspot.com" */
  PRIVATE(':', ','),
  /** Public suffix that is backed by an ICANN-style domain name registry */
  REGISTRY('!', '?');

  /** The character used for an inner node in the trie encoding */
  private final char innerNodeCode;

  /** The character used for a leaf node in the trie encoding */

            The OpenID Connect URL.
            """
            ),
        ],
        scheme_name: Annotated[
            Optional[str],
            Doc(
                """
                Security scheme name.

                It will be included in the generated OpenAPI (e.g. visible at `/docs`).
                """
            ),
        ] = None,
        description: Annotated[
            Optional[str],

    private boolean existNextPage;

    private List<Integer> pageNumberList;

    private int pageSize;

    private int currentPageNumber;

    public String id;

    public String name;

    public String paths;

    public String numOfThread;

    public String intervalTime;

    public String boost;

    public String available;

    public String sortOrder;

        }
    }

    protected void setupListCondition(final LabelTypeCB cb, final LabelTypePager labelTypePager) {
        if (StringUtil.isNotBlank(labelTypePager.name)) {
            cb.query().setName_Wildcard(wrapQuery(labelTypePager.name));
        }
        if (StringUtil.isNotBlank(labelTypePager.value)) {
            cb.query().setValue_Wildcard(wrapQuery(labelTypePager.value));
        }

        INTERFACES.put("samr", samr.getSyntax());
        INTERFACES.put("netdfs", netdfs.getSyntax());
    }

    public static void addInterface(String name, String syntax)
    {
        INTERFACES.put(name, syntax);
    }

    String proto;
    String server;
    String endpoint = null;
    HashMap options = null;
    UUID uuid = null;
    int major;
    int minor;