code: def handler(event, _):
      """Main Lambda handler function"""
      try:
          Classifier().run(event.get("Records", []))
      except Exception:
          logger.get_logger(__name__).exception(
              "Invocation event: %s", json.dumps(event)
          )
          raise
  
imports: import json
  from streamalert.classifier import Classifier
  from streamalert.shared import logger
label_desc: Use image node_id 1 for calling a global function with example usage: handler(event, _) without return types