different-operator-varname-taskid doesn't handle a subclassed operator with a dynamic task_id

[miketheman]

Example:

class AutoNameOperator(DummyOperator):
    def __init__(self, tbl_name):
        self.task_id = tbl_name.replace(".", "_")

    super().__init__(task_id=self.task_id)


eggs_spam = AutoNameOperator(tbl_name="eggs.spam")

I'd expect the evaluation of different-operator-varname-taskid to pass, however in this section:

pylint-airflow/src/pylint_airflow/checkers/operator.py

Lines 84 to 93 in 95b976b

	for keyword in node.value.keywords:
	if keyword.arg == "task_id" and isinstance(keyword.value, astroid.Const):
	# TODO support other values than constants
	task_id = keyword.value.value
	continue
	elif keyword.arg == "python_callable":
	python_callable_name = keyword.value.name
	if var_name != task_id:
	self.add_message("different-operator-varname-taskid", node=node)

task_id is None, and thereby raises the message.