code: def gru_state_tuples(num_nodes, name):
    
    if not isinstance(num_nodes, tf.compat.integral_types):
      raise ValueError('num_nodes must be an integer: %s' % num_nodes)
    return [(STATE_NAME % name + '_0', tf.float32, num_nodes)]
docs: Convenience so that the names of the vars are defined in the same file.