code: def testUnknownShape(self):
      t = self.batch_to_space(
          array_ops.placeholder(dtypes.float32),
          array_ops.placeholder(dtypes.int32),
          block_size=4,
      )
      self.assertEqual(4, t.get_shape().ndims)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.platform import test
label_desc: Use image node_id 6 for calling the BatchToSpaceErrorHandlingTest obj's underlying member method code with example usage: obj.testUnknownShape() without return types