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  1. docs_src/query_params_str_validations/tutorial004_py310.py

    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: str | None = Query(
            default=None, min_length=3, max_length=50, pattern="^fixedquery$"
        ),
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Tue Oct 24 20:26:06 UTC 2023
    - 335 bytes
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  2. docs/ja/docs/tutorial/query-params-str-validations.md

    デフォルト値`None`を`Query(default=None)`に置き換える必要があるので、`Query`の最初の引数はデフォルト値を定義するのと同じです。
    
    なので:
    
    ```Python
    q: Optional[str] = Query(default=None)
    ```
    
    ...を以下と同じようにパラメータをオプションにします:
    
    ```Python
    q: Optional[str] = None
    ```
    
    しかし、これはクエリパラメータとして明示的に宣言しています。
    
    /// info | 情報
    
    FastAPIは以下の部分を気にすることを覚えておいてください:
    
    ```Python
    = None
    ```
    
    もしくは:
    
    ```Python
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Mon Nov 18 02:25:44 UTC 2024
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  3. internal/ioutil/wait_pipe.go

    	"sync"
    )
    
    // PipeWriter is similar to io.PipeWriter with wait group
    type PipeWriter struct {
    	*io.PipeWriter
    	once sync.Once
    	done func()
    }
    
    // CloseWithError close with supplied error the writer end.
    func (w *PipeWriter) CloseWithError(err error) error {
    	err = w.PipeWriter.CloseWithError(err)
    	w.once.Do(func() {
    		w.done()
    	})
    	return err
    }
    
    // PipeReader is similar to io.PipeReader with wait group
    Registered: Sun Dec 28 19:28:13 UTC 2025
    - Last Modified: Thu Apr 27 14:55:36 UTC 2023
    - 1.7K bytes
    - Viewed (0)
  4. docs/uk/docs/tutorial/body-multiple-params.md

    Оскільки за замовчуванням окремі значення інтерпретуються як параметри запиту, Вам не потрібно явно додавати `Query`, можна просто використати:
    
    ```Python
    q: Union[str, None] = None
    ```
    
    Або в Python 3.10 та вище:
    
    ```Python
    q: str | None = None
    ```
    
    Наприклад:
    
    {* ../../docs_src/body_multiple_params/tutorial004_an_py310.py hl[28] *}
    
    
    /// info | Інформація
    
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Fri Feb 28 14:19:00 UTC 2025
    - 7.4K bytes
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  5. fastapi/_compat/shared.py

    ) -> bool:
        try:
            return isinstance(cls, type) and issubclass(cls, class_or_tuple)  # type: ignore[arg-type]
        except TypeError:  # pragma: no cover
            if isinstance(cls, WithArgsTypes):
                return False
            raise  # pragma: no cover
    
    
    def _annotation_is_sequence(annotation: Union[type[Any], None]) -> bool:
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Sat Dec 27 12:54:56 UTC 2025
    - 6.7K bytes
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  6. docs_src/query_params_str_validations/tutorial004_regex_an_py310.py

    from typing import Annotated
    
    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: Annotated[
            str | None, Query(min_length=3, max_length=50, regex="^fixedquery$")
        ] = None,
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Mon Nov 18 02:25:44 UTC 2024
    - 366 bytes
    - Viewed (0)
  7. docs_src/query_params_str_validations/tutorial007_an_py310.py

    from typing import Annotated
    
    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: Annotated[str | None, Query(title="Query string", min_length=3)] = None,
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Tue Mar 26 16:56:53 UTC 2024
    - 337 bytes
    - Viewed (0)
  8. docs_src/query_params_str_validations/tutorial004_an_py39.py

    from typing import Annotated, Union
    
    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: Annotated[
            Union[str, None], Query(min_length=3, max_length=50, pattern="^fixedquery$")
        ] = None,
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Tue Oct 24 20:26:06 UTC 2023
    - 381 bytes
    - Viewed (0)
  9. docs/es/docs/tutorial/body.md

    /// note | Nota
    
    FastAPI sabrá que el valor de `q` no es requerido debido al valor por defecto `= None`.
    
    El `str | None` (Python 3.10+) o `Union` en `Union[str, None]` (Python 3.9+) no es utilizado por FastAPI para determinar que el valor no es requerido, sabrá que no es requerido porque tiene un valor por defecto de `= None`.
    
    Pero agregar las anotaciones de tipos permitirá que tu editor te brinde un mejor soporte y detecte errores.
    
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Wed Dec 17 20:41:43 UTC 2025
    - 7.6K bytes
    - Viewed (0)
  10. docs_src/encoder/tutorial001_py310.py

    from fastapi import FastAPI
    from fastapi.encoders import jsonable_encoder
    from pydantic import BaseModel
    
    fake_db = {}
    
    
    class Item(BaseModel):
        title: str
        timestamp: datetime
        description: str | None = None
    
    
    app = FastAPI()
    
    
    @app.put("/items/{id}")
    def update_item(id: str, item: Item):
        json_compatible_item_data = jsonable_encoder(item)
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Fri Jan 07 14:11:31 UTC 2022
    - 430 bytes
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