refactor: rename operators args make it clearer

Signed-off-by: machichima <nary12321@gmail.com>

Author: machichima

python/ray/data/_internal/issue_detection/detectors/hanging_detector.py

@@ -45,11 +45,11 @@ class HangingExecutionIssueDetector(IssueDetector):
     def __init__(
         self,
         dataset_id: str,
-        operators: Callable[[], List["PhysicalOperator"]],
+        get_operators: Callable[[], List["PhysicalOperator"]],
         config: "HangingExecutionIssueDetectorConfig",
     ):
         self._dataset_id = dataset_id
-        self._get_operators = operators
+        self._get_operators = get_operators
         self._detector_cfg = config
 
         self._op_task_stats_min_count = self._detector_cfg.op_task_stats_min_count
@@ -77,12 +77,16 @@ def from_executor(
         Returns:
             An instance of HangingExecutionIssueDetector.
         """
+
+        def get_operators_fn() -> List["PhysicalOperator"]:
+            if not executor._topology:
+                return []
+            return list(executor._topology.keys())
+
         ctx = executor._data_context
         return cls(
             dataset_id=executor._dataset_id,
-            operators=lambda: list(executor._topology.keys())
-            if executor._topology
-            else [],
+            get_operators=get_operators_fn,
             config=ctx.issue_detectors_config.hanging_detector_config,
         )