# Background Tasks - BackgroundTasks¶

You can declare a parameter in a _path operation function_ or dependency function with the type `BackgroundTasks`, and then you can use it to schedule the execution of background tasks after the response is sent.

You can import it directly from `fastapi`:

```
from fastapi import BackgroundTasks
```

## fastapi.BackgroundTasks [¶](#fastapibackgroundtasks-)

```
BackgroundTasks(tasks=None)
```

Bases: `BackgroundTasks`

A collection of background tasks that will be called after a response has been sent to the client.

Read more about it in the [FastAPI docs for Background Tasks](/guides/tutorial-user-guide-background-tasks).

#### Example[¶](#example)

```
from fastapi import BackgroundTasks, FastAPI

app = FastAPI()

def write_notification(email: str, message=""):
    with open("log.txt", mode="w") as email_file:
        content = f"notification for {email}: {message}"
        email_file.write(content)

@app.post("/send-notification/{email}")
async def send_notification(email: str, background_tasks: BackgroundTasks):
    background_tasks.add_task(write_notification, email, message="some notification")
    return {"message": "Notification sent in the background"}
```

:::accordion{title="Source code in starlette/background.py"}
```
def __init__(self, tasks: Sequence[BackgroundTask] | None = None):
    self.tasks = list(tasks) if tasks else []
```
:::

### func `instance-attribute` [¶](#func-instance-attribute-)

```
func = func
```

### args `instance-attribute` [¶](#args-instance-attribute-)

```
args = args
```

### kwargs `instance-attribute` [¶](#kwargs-instance-attribute-)

```
kwargs = kwargs
```

### is\_async `instance-attribute` [¶](#isasync-instance-attribute-)

```
is_async = is_async_callable(func)
```

### tasks `instance-attribute` [¶](#tasks-instance-attribute-)

```
tasks = list(tasks) if tasks else []
```

### add\_task [¶](#addtask-)

```
add_task(func, *args, **kwargs)
```

Add a function to be called in the background after the response is sent.

Read more about it in the [FastAPI docs for Background Tasks](/guides/tutorial-user-guide-background-tasks).

| PARAMETER | DESCRIPTION                                                                                                                                  |
| --------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
| `func`    | The function to call after the response is sent. It can be a regular `def` function or an `async def` function. **TYPE:** `Callable[P, Any]` |

:::accordion{title="Source code in fastapi/background.py"}
```
def add_task(
    self,
    func: Annotated[
        Callable[P, Any],
        Doc(
            """
            The function to call after the response is sent.

            It can be a regular `def` function or an `async def` function.
            """
        ),
    ],
    *args: P.args,
    **kwargs: P.kwargs,
) -> None:
    """
    Add a function to be called in the background after the response is sent.

    Read more about it in the
    [FastAPI docs for Background Tasks](../tutorial/background-tasks.md).
    """
    return super().add_task(func, *args, **kwargs)
```
:::

## Related pages

- [About](./about-index.md)
- [Advanced User Guide](./advanced-user-guide-index.md)
- [Deployment](./deployment-index.md)
- [FastAPI](./fastapi-index.md)
- [FastAPI Docs](../index.md)
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