code: def extract_state(batched_states, i):
      """Extracts a single state from a batch of states.
  
      Args:
        batched_states: A nested structure with entries whose first dimensions all
          equal N.
        i: The index of the state to extract.
  
      Returns:
        A tuple containing tensors (or tuples of tensors) of the same structure as
        rnn_nade_state, but containing only the state values that represent the
        state at index i. The tensors will now have the shape (1, N).
      """
      return tf.nest.map_structure(lambda x: x[i], batched_states)
  
imports: import numpy
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling a global function with example usage: extract_state(batched_states, i) and returns: tf