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  2. github.com/google/guava

    android/guava-tests/test/com/google/common/base/CharMatcherTest.java 

        assertSame(CharMatcher.any(), CharMatcher.none().negate());
    assertSame(CharMatcher.none(), CharMatcher.any().negate());

    assertSame(WHATEVER, CharMatcher.any().and(WHATEVER));
    assertSame(CharMatcher.any(), CharMatcher.any().or(WHATEVER));

    assertSame(CharMatcher.none(), CharMatcher.none().and(WHATEVER));
    assertSame(WHATEVER, CharMatcher.none().or(WHATEVER));
  }
    Registered: Fri Sep 05 12:43:10 UTC 2025
    - Last Modified: Thu Aug 07 16:05:33 UTC 2025
    - 30.3K bytes
    - Viewed (0)
  3. github.com/tiangolo/fastapi

    docs/es/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 21.5K bytes
    - Viewed (0)
  4. github.com/tiangolo/fastapi

    docs/nl/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 21.2K bytes
    - Viewed (0)
  5. github.com/tiangolo/fastapi

    docs/pt/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 21.6K bytes
    - Viewed (0)
  6. github.com/google/guava

    guava-tests/test/com/google/common/base/CharMatcherTest.java 

        assertSame(CharMatcher.any(), CharMatcher.none().negate());
    assertSame(CharMatcher.none(), CharMatcher.any().negate());

    assertSame(WHATEVER, CharMatcher.any().and(WHATEVER));
    assertSame(CharMatcher.any(), CharMatcher.any().or(WHATEVER));

    assertSame(CharMatcher.none(), CharMatcher.none().and(WHATEVER));
    assertSame(WHATEVER, CharMatcher.none().or(WHATEVER));
  }
    Registered: Fri Sep 05 12:43:10 UTC 2025
    - Last Modified: Thu Aug 07 16:05:33 UTC 2025
    - 30.4K bytes
    - Viewed (0)
  7. github.com/tiangolo/fastapi

    docs/de/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 21.1K bytes
    - Viewed (0)
  8. github.com/tiangolo/fastapi

    docs/tr/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 21.9K bytes
    - Viewed (0)
  9. github.com/tiangolo/fastapi

    docs/pt/docs/how-to/separate-openapi-schemas.md 

    </div>

Isso significa que ele **sempre terá um valor**, só que às vezes o valor pode ser `None` (ou `null` em termos de JSON).

Isso quer dizer que, os clientes que usam sua API não precisam verificar se o valor existe ou não, eles podem **assumir que o campo sempre estará lá**, mas que em alguns casos terá o valor padrão de `None`.

A maneira de descrever isso no OpenAPI é marcar esse campo como **obrigatório**, porque ele sempre estará lá.
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Mon Nov 18 02:25:44 UTC 2024
    - 4.5K bytes
    - Viewed (0)
  10. github.com/tiangolo/fastapi

    docs/bn/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 30.5K bytes
    - Viewed (0)
  11. github.com/tiangolo/fastapi

    docs/hu/docs/index.md 

    app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):
    Registered: Sun Sep 07 07:19:17 UTC 2025
    - Last Modified: Sun Aug 31 10:49:48 UTC 2025
    - 20.2K bytes
    - Viewed (0)
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