# FastAPI
## 0. Quelle
[https://realpython.com/api-integration-in-python/#django-rest-framework](https://realpython.com/api-integration-in-python/#django-rest-framework)

## 1. FastAPI und Uvicorn installieren
* `pip install fastapi`
* `pip install uvicorn[standard]`

## 2. Quellcode: Datei app.py
```python
# app.py
from fastapi import FastAPI
from pydantic import BaseModel, Field

app = FastAPI()

def _find_next_id():
    return max(country.country_id for country in countries) + 1

class Country(BaseModel):
    country_id: int = Field(default_factory=_find_next_id, alias="id")
    name: str
    capital: str
    area: int

countries = [
    Country(id=1, name="Thailand", capital="Bangkok", area=513120),
    Country(id=2, name="Australia", capital="Canberra", area=7617930),
    Country(id=3, name="Egypt", capital="Cairo", area=1010408),
]

@app.get("/countries")
async def get_countries():
    return countries

@app.post("/countries", status_code=201)
async def add_country(country: Country):
    countries.append(country)
    return country
```
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## 3. Server starten
`uvicorn app:app --reload`

## 4. Server testen
### Daten
[http://127.0.0.1:8000/countries](http://127.0.0.1:8000/countries)

### Dokumentationen
* OpenAPI (Swagger): [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs)
* Redoc: [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc)