AndersonReyes commented on issue #8996:
URL: https://github.com/apache/airflow/issues/8996#issuecomment-674455353
after some googling looks like this can be achieved like this
```
....
if python_callable:
sig = signature(python_callable).return_annotation
if get_origin(sig) in (dict, tuple):
multiple_outputs = True
....
```
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