ashb commented on a change in pull request #18112:
URL: https://github.com/apache/airflow/pull/18112#discussion_r705617047



##########
File path: airflow/exceptions.py
##########
@@ -256,12 +278,21 @@ def __init__(
         self.method_name = method_name
         self.kwargs = kwargs
         self.timeout = timeout
+
         # Check timeout type at runtime
         if self.timeout is not None and not hasattr(self.timeout, 
"total_seconds"):
             raise ValueError("Timeout value must be a timedelta")
 
+        # Check keyword arguments
+        if kwargs:
+            if method_name is None:
+                raise ValueError("Keyword arguments not allowed when method is 
not specified")

Review comment:
       > It makes it possible to use pre_execute as a general mechanism (or 
workaround) for adding logic before an operator runs – that's at least my 
example use-case here, delaying any odd operator without making a change.
   
   This sounds like a bit of an anti-pattern to me -- TimeDeltaSensor (+ an 
Async version) already exists, or change the schedule of the whole DAG to be N 
minutes later.




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