code: def testTypeIsListError(self):
      def generator():
          for _ in range(10):
              yield [20]
  
      with self.assertRaisesRegex(
          TypeError,
          r"Cannot convert the argument `type_value`: "
          r"\[tf.int64\] to a TensorFlow DType",
      ):
          dataset_ops.Dataset.from_generator(
              generator, output_types=[dtypes.int64]
          )
  
imports: import threading
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import from_generator_op
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.ops import script_ops
  from tensorflow.python.ops import sparse_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import test
label_desc: Use image node_id 23 for calling the FromGeneratorTest obj's underlying member method code with example usage: obj.testTypeIsListError() without return types