code: def test_argument_handler_error_handling(self):
      qa = QuestionAnsweringArgumentHandler()
  
      Q = "Where was HuggingFace founded ?"
      C = "HuggingFace was founded in Paris"
  
      with self.assertRaises(KeyError):
          qa({"context": C})
      with self.assertRaises(KeyError):
          qa({"question": Q})
      with self.assertRaises(KeyError):
          qa([{"context": C}])
      with self.assertRaises(ValueError):
          qa(None, C)
      with self.assertRaises(ValueError):
          qa("", C)
      with self.assertRaises(ValueError):
          qa(Q, None)
      with self.assertRaises(ValueError):
          qa(Q, "")
  
      with self.assertRaises(ValueError):
          qa(question=None, context=C)
      with self.assertRaises(ValueError):
          qa(question="", context=C)
      with self.assertRaises(ValueError):
          qa(question=Q, context=None)
      with self.assertRaises(ValueError):
          qa(question=Q, context="")
  
      with self.assertRaises(ValueError):
          qa({"question": None, "context": C})
      with self.assertRaises(ValueError):
          qa({"question": "", "context": C})
      with self.assertRaises(ValueError):
          qa({"question": Q, "context": None})
      with self.assertRaises(ValueError):
          qa({"question": Q, "context": ""})
  
      with self.assertRaises(ValueError):
          qa(
              [
                  {"question": Q, "context": C},
                  {"question": None, "context": C},
              ]
          )
      with self.assertRaises(ValueError):
          qa(
              [
                  {"question": Q, "context": C},
                  {"question": "", "context": C},
              ]
          )
  
      with self.assertRaises(ValueError):
          qa(
              [
                  {"question": Q, "context": C},
                  {"question": Q, "context": None},
              ]
          )
      with self.assertRaises(ValueError):
          qa(
              [
                  {"question": Q, "context": C},
                  {"question": Q, "context": ""},
              ]
          )
  
      with self.assertRaises(ValueError):
          qa(question={"This": "Is weird"}, context="This is a context")
  
      with self.assertRaises(ValueError):
          qa(question=[Q, Q], context=[C, C, C])
  
      with self.assertRaises(ValueError):
          qa(question=[Q, Q, Q], context=[C, C])
  
imports: import unittest
  from transformers import MODEL_FOR_QUESTION_ANSWERING_MAPPING, TF_MODEL_FOR_QUESTION_ANSWERING_MAPPING, LxmertConfig, QuestionAnsweringPipeline
  from transformers.data.processors.squad import SquadExample
  from transformers.pipelines import QuestionAnsweringArgumentHandler, pipeline
  from transformers.testing_utils import nested_simplify, require_tf, require_torch, require_torch_or_tf, slow
  from .test_pipelines_common import ANY, PipelineTestCaseMeta
label_desc: Use image node_id 2 for calling the QuestionAnsweringArgumentHandlerTests obj's underlying member method code with example usage: obj.test_argument_handler_error_handling() without return types