ashb commented on a change in pull request #20931:
URL: https://github.com/apache/airflow/pull/20931#discussion_r787673127
##########
File path: airflow/models/xcom_arg.py
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@@ -59,9 +61,9 @@ class XComArg(DependencyMixin):
:type key: str
"""
- def __init__(self, operator: Union[BaseOperator, MappedOperator], key: str
= XCOM_RETURN_KEY):
- self._operator = operator
- self._key = key
+ def __init__(self, operator: "Union[BaseOperator, MappedOperator]", key:
str = XCOM_RETURN_KEY):
Review comment:
To avoid uncessary imports/reduce chance import cycles.
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