code: def testAsDtypeInvalidArgument(self):
      with self.assertRaises(TypeError):
          dtypes.as_dtype((dtypes.int32, dtypes.float32))
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import _dtypes
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.function import trace_type
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 21 for calling the TypesTest obj's underlying member method code with example usage: obj.testAsDtypeInvalidArgument() without return types