code: def _tf_not(a):
      """Implementation of the "not_" operator for TensorFlow."""
      return gen_math_ops.logical_not(a)
  
file_path: tensorflow-upstream/tensorflow/python/autograph/operators/logical.py
imports: from tensorflow.python.framework import tensor_util
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import gen_math_ops
label_desc: Use image node_id 2 for calling a global function with example usage: _tf_not(a) and returns: gen_math_ops