code: def testPdfXStretchedInBroadcastWhenLowerRank(self):
      alpha = [[1.0, 2], [2.0, 3]]
      x = [0.5, 0.5]
      pdf = dirichlet_lib.Dirichlet(alpha).prob(x)
      self.assertAllClose([1.0, 3.0 / 2], self.evaluate(pdf))
      self.assertEqual((2), pdf.get_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 12 for calling the DirichletTest obj's underlying member method code with example usage: obj.testPdfXStretchedInBroadcastWhenLowerRank() without return types