code: def lerp(
      a: TfExpressionEx, b: TfExpressionEx, t: TfExpressionEx
  ) -> TfExpressionEx:
      """Linear interpolation."""
      with tf.name_scope("Lerp"):
          return a + (b - a) * t
  
imports: import os
  import numpy
  import tensorflow
  import logging
  import tensorflow.contrib
  from typing import Any, Iterable, List, Union
label_desc: Use image node_id 7 for calling a global function with example usage: lerp(a, b, t) and returns: unknown