casassg commented on a change in pull request #8962:
URL: https://github.com/apache/airflow/pull/8962#discussion_r432023999
##########
File path: airflow/operators/python.py
##########
@@ -145,6 +148,140 @@ def execute_callable(self):
return self.python_callable(*self.op_args, **self.op_kwargs)
+class _PythonFunctionalOperator(BaseOperator):
+ """
+ Wraps a Python callable and captures args/kwargs when called for execution.
+
+ :param python_callable: A reference to an object that is callable
+ :type python_callable: python callable
+ :param multiple_outputs: if set, function return value will be
+ unrolled to multiple XCom values. Dict will unroll to xcom values with
keys as keys.
+ Defaults to False.
+ :type multiple_outputs: bool
+ """
+
+ template_fields = ('_op_args', '_op_kwargs')
+ ui_color = '#ffefeb'
+
+ # since we won't mutate the arguments, we should just do the shallow copy
+ # there are some cases we can't deepcopy the objects(e.g protobuf).
+ shallow_copy_attrs = ('python_callable',)
+
+ @apply_defaults
+ def __init__(
+ self,
+ python_callable: Callable,
+ multiple_outputs: bool = False,
+ **kwargs
+ ) -> None:
+ self._validate_python_callable(python_callable)
+ super().__init__(**kwargs)
+ self.python_callable = python_callable
+ self.multiple_outputs = multiple_outputs
+ self._kwargs = kwargs
+ self._op_args: List[Any] = []
+ self._called = False
+ self._op_kwargs: Dict[str, Any] = {}
+
+ @staticmethod
+ def _get_unique_task_id(task_id: str, dag: Optional[DAG]) -> str:
+ dag = dag or DagContext.get_current_dag()
+ if not dag or task_id not in dag.task_ids:
+ return task_id
+ core = re.split(r'__\d+$', task_id)[0]
+ suffixes = sorted(
+ [int(re.split(r'^.+__', task_id)[1])
+ for task_id in dag.task_ids
+ if re.match(rf'^{core}__\d+$', task_id)]
+ )
+ if not suffixes:
+ return f'{core}__1'
+ return f'{core}__{suffixes[-1] + 1}'
Review comment:
we also use type annotations which is py3 only. We should probs decide
if we want to support Python2 or not at all.
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