code: def testUnknownShape(self):
      t = array_ops.depth_to_space(
          array_ops.placeholder(dtypes.float32), block_size=4
      )
      self.assertEqual(4, t.get_shape().ndims)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.client import device_lib
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  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.ops import math_ops
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 16 for calling the DepthToSpaceTest obj's underlying member method code with example usage: obj.testUnknownShape() without return types