# module.

# pylint: disable=g-bad-import-order
from tensorflow.python import pywrap_tensorflow  # pylint: disable=unused-import

from tensorflow.python.platform import flags  # pylint: disable=g-import-not-at-top
from tensorflow.python.platform import app  # pylint: disable=g-import-not-at-top
app.flags = flags

# These symbols appear because we import the python package which
# in turn imports from tensorflow.core and tensorflow.python. They

Now it's the time to use it with FastAPI. 🚀

We had this type annotation:

//// tab | Python 3.10+

```Python
q: str | None = None
```

////

//// tab | Python 3.8+

```Python
q: Union[str, None] = None
```

////

Ви робите це за допомогою стандартних сучасних типів Python.

Вам не потрібно вивчати новий синтаксис, методи чи класи конкретної бібліотеки тощо.

Використовуючи стандартний **Python**.

Наприклад, для `int`:

```Python
item_id: int
```

або для більш складної моделі `Item`:

```Python
item: Item
```

...і з цим єдиним оголошенням Ви отримуєте:

<div class="termy">

```console
$ which python

/home/user/code/awesome-project/.venv/bin/python
```

</div>

If it shows the `python` binary at `.venv/bin/python`, inside of your project (in this case `awesome-project`), then it worked. 🎉

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ Get-Command python

Hello Wade Wilson
```

</div>

////

## Pythonで環境変数を読み取る

環境変数をPythonの**外側**、ターミナル（や他の方法）で作成し、**Python内で読み取る**こともできます。

例えば、以下のような`main.py`ファイルを用意します:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

So, if we create a Pydantic object `user_in` like:

```Python
user_in = UserIn(username="john", password="secret", email="******@****.***")
```

and then we call:

```Python
user_dict = user_in.dict()
```

we now have a `dict` with the data in the variable `user_dict` (it's a `dict` instead of a Pydantic model object).

And if we call:

```Python
print(user_dict)
```

<div class="termy">

```console
$ python myapp.py
```

</div>

mas não é chamado quando outro arquivo o importa, como em:

```Python
from myapp import app
```

#### Mais detalhes

Digamos que seu arquivo se chama `myapp.py`.

Se você executá-lo com:

<div class="termy">

```console
$ python myapp.py
```

</div>

> Requests, tüm zamanların en çok indirilen Python  <abbr title="Paket: Package">paketlerinden</abbr> biridir.

Kullanım şekli oldukça basit. Örneğin bir `GET` isteği yapmak için aşağıdaki yeterli:

```Python
response = requests.get("http://example.com/some/url")
```

Bunun FastAPI'deki API <abbr title="Yol İşlemi: Path Operation">*yol işlemi*</abbr> şöyle görünür:

```Python hl_lines="1"
@app.get("/some/url")
def read_url():

```JSON
{"item_id":3}
```

/// check | Periksa

Perhatikan nilai fungsi yang diterima (dan dihasilkan) adalah `3`, sebagai `int` di Python, dan bukan string `"3"`.

Sehingga dengan deklarasi tipe data **FastAPI** memberikan request otomatis <abbr title="konversi string dari request HTTP menjadi data Python">"parsing"</abbr>.

///

## Validasi Data

<div class="termy">

```console
$ python myapp.py
```

</div>

mais qui n'est pas appelé lorsqu'un autre fichier l'importe, comme dans :

```Python
from myapp import app
```

#### Pour davantage de détails

Imaginons que votre fichier s'appelle `myapp.py`.

Si vous l'exécutez avec :

<div class="termy">

```console
$ python myapp.py
```

</div>