code: def testBidirectionalDynamicRNNScope(self):
      def factory(scope):
          return self._createStackBidirectionalDynamicRNN(
              use_gpu=True,
              use_shape=True,
              use_state_tuple=True,
              scope=scope,
          )
  
      self._testScope(factory, use_outer_scope=True)
      self._testScope(factory, use_outer_scope=False)
      self._testScope(factory, prefix=None, use_outer_scope=False)
  
imports: import itertools
  from absl.testing import parameterized
  from magenta.contrib import rnn
  import numpy
  import tensorflow.compat.v1
label_desc: Use image node_id 7 for calling the StackBidirectionalRNNTest obj's underlying member method code with example usage: obj.testBidirectionalDynamicRNNScope() and returns: self