{* ../../docs_src/encoder/tutorial001_py310.py hl[4,21] *}

У цьому прикладі вона конвертує модель Pydantic у `dict`, а `datetime` у `str`.

Результат виклику цієї функції — це щось, що можна кодувати з використанням стандарту Python [`json.dumps()`](https://docs.python.org/3/library/json.html#json.dumps).

		{".txt,.log", []string{".txt", ".log"}, true},
		{"text/*,application/json", []string{"text/*", "application/json"}, true},
	}

	for _, testCase := range testCases {
		t.Run(testCase.str, func(t *testing.T) {
			gotPatterns, err := parseCompressIncludes(testCase.str)
			if !testCase.success && err == nil {
				t.Error("expected failure but success instead")
			}
			if testCase.success && err != nil {

@app.post("/form-json-list")
def form_json_list(items: Annotated[Json[list[str]], Form()]) -> list[str]:
    return items


@app.get("/query-json-list")
def query_json_list(items: Annotated[Json[list[str]], Query()]) -> list[str]:
    return items


@app.get("/header-json-list")
def header_json_list(x_items: Annotated[Json[list[str]], Header()]) -> list[str]:
    return x_items


@app.get("/cookie-json-list")

        PacDataInputStream pdis = createInputStream(data);
        PacUnicodeString str = pdis.readUnicodeString();
        assertEquals(4, str.getLength());
        assertEquals(4, str.getMaxLength());
        assertEquals(0x1234, str.getPointer());
    }

    @Test
    public void testReadUnicodeStringMalformed() throws IOException {
        // length > maxLength

Por exemplo, você poderia declarar que algo pode ser `str` ou `None`:

```python
from typing import Union


def say_hi(name: Union[str, None]):
        print(f"Hi {name}!")
```

O `typing` também tem um atalho para declarar que algo pode ser `None`, com `Optional`.

from typing import Any


def get_body_model_name(openapi: dict[str, Any], path: str) -> str:
    body = openapi["paths"][path]["post"]["requestBody"]
    body_schema = body["content"]["application/x-www-form-urlencoded"]["schema"]

from fastapi import Cookie, FastAPI
from pydantic import BaseModel

app = FastAPI()


class Cookies(BaseModel):
    session_id: str
    fatebook_tracker: str | None = None
    googall_tracker: str | None = None


@app.get("/items/")
async def read_items(cookies: Cookies = Cookie()):

from fastapi import FastAPI, status
from pydantic import BaseModel

app = FastAPI()


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


@app.post("/items/", status_code=status.HTTP_201_CREATED)
async def create_item(item: Item) -> Item:

    }

    /**
     * Constructs a UnicodeString from a Java String.
     *
     * @param str wrapped string
     * @param zterm whether the string should be zero terminated
     */
    public UnicodeString(final String str, final boolean zterm) {
        this.zterm = zterm;

        final int len = str.length();
        final int zt = zterm ? 1 : 0;

        length = maximum_length = (short) ((len + zt) * 2);

        state["finally"] = True


@app.put("/invalid-user/{user_id}")
def put_invalid_user(
    user_id: str, name: str = Body(), db: dict = Depends(get_database)
):
    db[user_id] = name
    raise HTTPException(status_code=400, detail="Invalid user")


@app.put("/user/{user_id}")
def put_user(user_id: str, name: str = Body(), db: dict = Depends(get_database)):
    db[user_id] = name
    return {"message": "OK"}