# Parameter Path

"parameter" atau "variabel" path didefinisikan dengan sintaksis Python format string:

{* ../../docs_src/path_params/tutorial001.py hl[6:7] *}

Nilai parameter path `item_id` akan dikirim ke fungsi sebagai argument `item_id`:

Jika anda menjalankan contoh berikut dan kunjungi <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>, anda akan melihat respon:

```JSON

    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}
```

<details markdown="1">
<summary>Atau gunakan <code>async def</code>...</summary>

Jika kode anda menggunakan `async` / `await`, gunakan `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

pv23--nx?13ynr--nx?22tsiu--nx?61qqle--nx?o-hu,sulb,?i&54urkm--nx?azosbew,ced,g&ayim!.&a&dukak?m&a&goihs?kihs??ihsustam!ihsagih??unawi??r&awago?iho??ta&bihs?rum??w&a&gano?kuruf??iat??y&imot?ukaw???e&mot?nimes??i&hsiorihs?ka&monihsi?s&awak?o???mak?r&ataw?o&muram?tan????o&az?jagat?t&asim?omamay???u&fir?k&irnasimanim?uhsakihcihs?????ihcot!.&a&g&a&h?kihsa??ust??kom?m&ay&o?usarak??unak??r&a&boihsusan?watho??iho?ukas??t&akihsin?iay??wa&konimak?zenakat??y&imonustu?oihs???e&iiju?kustomihs?nufawi??i&akihc...

*   Enable JIT-compiled i64-indexed kernels on GPU for large tensors with more than 2**32 elements.
    *   Unary GPU kernels: Abs, Atanh, Acos, Acosh, Asin, Asinh, Atan, Cos, Cosh, Sin, Sinh, Tan, Tanh.
    *   Binary GPU kernels: AddV2, Sub, Div, DivNoNan, Mul, MulNoNan, FloorDiv, Equal, NotEqual, Greater, GreaterEqual, LessEqual, Less.

* `tf.lite`