code: def testSimpleShapes(self):
      alpha = np.random.rand(3)
      dist = dirichlet_lib.Dirichlet(alpha)
      self.assertEqual(3, self.evaluate(dist.event_shape_tensor()))
      self.assertAllEqual([], self.evaluate(dist.batch_shape_tensor()))
      self.assertEqual(tensor_shape.TensorShape([3]), dist.event_shape)
      self.assertEqual(tensor_shape.TensorShape([]), dist.batch_shape)
  
imports: import importlib
  import numpy
  from tensorflow.python.eager import backprop
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops.distributions import dirichlet
  from tensorflow.python.ops.distributions import kullback_leibler
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 1 for calling the DirichletTest obj's underlying member method code with example usage: obj.testSimpleShapes() without return types