ashb commented on a change in pull request #20795:
URL: https://github.com/apache/airflow/pull/20795#discussion_r781987743
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File path: airflow/decorators/task_group.py
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@@ -61,7 +61,7 @@ def __attrs_post_init__(self):
def _make_task_group(self, **kwargs) -> TaskGroup:
return TaskGroup(**kwargs)
- def __call__(self, *args, **kwargs) -> R:
+ def __call__(self, *args, **kwargs) -> Union[R, TaskGroup]:
Review comment:
```
@task_group
def foo() -> BashOperator
return BashOperator(task_id='a')
bash_op = foo()
```
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