code: def _shape_for_channels(num_channels, *, length=None):
      """Returns the shape."""
      return (length,) if num_channels == 1 else (length, num_channels)
  
imports: import array
  import pathlib
  import tempfile
  from absl.testing import parameterized
  import numpy
  import pydub
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 1 for calling a global function with example usage: _shape_for_channels(num_channels) and returns: unknown