É apenas uma função padrão que pode receber parâmetros.

Pode ser uma função `async def` ou `def` normal, o **FastAPI** saberá como lidar com isso corretamente.

Nesse caso, a função de tarefa gravará em um arquivo (simulando o envio de um e-mail).

E como a operação de gravação não usa `async` e `await`, definimos a função com `def` normal:

```Python hl_lines="6-9"
{!../../docs_src/background_tasks/tutorial001.py!}
```

It is just a standard function that can receive parameters.

It can be an `async def` or normal `def` function, **FastAPI** will know how to handle it correctly.

In this case, the task function will write to a file (simulating sending an email).

And as the write operation doesn't use `async` and `await`, we define the function with normal `def`:

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## Add the background task

from fastapi import FastAPI

app = FastAPI()


@app.get("/items/{item_id}")
async def read_item(item_id: int):

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_main():

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def root():

def get_name_with_age(name: str, age: int):
    name_with_age = name + " is this old: " + str(age)

def say_hi(name: str | None = None):
    if name is not None:
        print(f"Hey {name}!")
    else:

    "baz": {"name": "Baz", "description": None, "price": 50.2, "tax": 10.5, "tags": []},
}


@app.get("/items/{item_id}", response_model=Item)
async def read_item(item_id: str):
    return items[item_id]


@app.put("/items/{item_id}", response_model=Item)
async def update_item(item_id: str, item: Item):
    update_item_encoded = jsonable_encoder(item)
    items[item_id] = update_item_encoded

def get_full_name(first_name: str, last_name: str):
    full_name = first_name.title() + " " + last_name.title()
    return full_name

            addExcludeFilter(KotlinInternalFilter)
            addExcludeFilter(BridgeForBytecodeUpgradeAdapterClassFilter)

            def acceptedChangesMap = acceptedViolations.toAcceptedChangesMap()

            def mainApiChangesJsonFilePath = mainApiChangesJsonFile.path
            def projectRootDirPath = projectRootDir.asFile.path

            richReport.get().tap {
                addRule(IncubatingInternalInterfaceAddedRule, [