```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

## Àpẹẹrẹ

### Ṣẹ̀dá rẹ̀

* Ṣẹ̀dá fáìlì `main.py (èyí tíí ṣe, akọkọ.py)` pẹ̀lú:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


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


@app.get("/items/{item_id}")

paying_user --> pro_items
```

## Integrated with **OpenAPI**

All these dependencies, while declaring their requirements, also add parameters, validations, etc. to your *path operations*.