code: def test_attn_config_as_dict(self):
      config = self.config_class(
          **self.inputs_dict,
          attn_config={"attn_impl": "flash", "softmax_scale": None},
      )
      self.parent.assertTrue(config.attn_config.attn_impl == "flash")
      self.parent.assertTrue(config.attn_config.softmax_scale is None)
  
imports: import math
  import unittest
  from transformers import MptConfig, is_torch_available
  from transformers.testing_utils import require_bitsandbytes, require_torch, require_torch_gpu, slow, torch_device
  from ...generation.test_utils import GenerationTesterMixin
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 2 for calling the MptConfigTester obj's underlying member method code with example usage: obj.test_attn_config_as_dict() without return types