# Moose / Workflows / Cancel Workflow Documentation – Python

## Included Files
1. moose/workflows/cancel-workflow/cancel-workflow.mdx

## cancel-workflow

Source: moose/workflows/cancel-workflow/cancel-workflow.mdx

# Cancel a Running Workflow

To stop a workflow before it has finished running, use the `workflow cancel` command.

```bash filename="Terminal" copy
moose workflow cancel <workflow-name>
```

### Implementing Cancelation Callbacks

For workflows that are running and have clean up operations to perform, you can implement a termination callback.

This is especially useful for any long running tasks that have open connections or subscriptions to other services that need to be closed. 
You may also use the `state` within the run/cancel context to supplement your business logic.

```python filename="workflows/workflows.py" copy

def run_task1(ctx: TaskContext[Foo]) -> None:
    connection.open()

def on_cancel(ctx: TaskContext[Foo]) -> None:
    # Clean up any resources
    connection.close()

task1 = Task[Foo, None](
    name="task1",
    config=TaskConfig(run=run_task1, on_cancel=on_cancel)
)

myworkflow = Workflow(
  name="myworkflow",
  config=WorkflowConfig(starting_task=task1, retries=3)
)
```