code: def null_postprocessing(results):
      """A postprocessing function returned by a transform that only converts the batch of results
      into a result for a single ``QuantumTape``.
      """
      return results[0]
  
imports: import os
  from typing import Generator, Callable, Union, Sequence, Optional
  from copy import copy
  import warnings
  import pennylane
  from pennylane import Snapshot
  from pennylane.operation import Tensor, StatePrepBase
  from pennylane.measurements import MeasurementProcess, StateMeasurement, SampleMeasurement
  from pennylane.typing import ResultBatch, Result
  from pennylane import DeviceError
  from pennylane import transform
  from pennylane.wires import WireError
label_desc: Use image node_id 1 for calling a global function with example usage: null_postprocessing(results) and returns: results