code: def testUnknownShape(self):
      logits_pl = tf1.placeholder_with_default(
          [0.3, 0.1, 0.4], shape=None
      )
      temperature = 1.0
      dist = roc.ExpRelaxedOneHotCategorical(
          temperature, logits_pl, validate_args=True
      )
      self.assertAllEqual(
          [3],
          self.evaluate(dist.sample(seed=test_util.test_seed())).shape,
      )
      self.assertAllEqual(
          [5, 3],
          self.evaluate(
              dist.sample(5, seed=test_util.test_seed())
          ).shape,
      )
  
imports: from absl.testing import parameterized
  import numpy
  from scipy.special import gamma
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import identity
  from tensorflow_probability.python.distributions import relaxed_onehot_categorical
  from tensorflow_probability.python.internal import tensorshape_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.util import deferred_tensor
label_desc: Use image node_id 8 for calling the RelaxedOneHotCategoricalTest obj's underlying member method code with example usage: obj.testUnknownShape() without return types