code: def one_m_simplify(expr):
      """Replaces ("#Sub", (<wrapped constant 1>,), (.)) with ("#One_minus", .)."""
      if expr[0] != "#Sub" or not isinstance(expr[1][0], tf.Tensor):
          return None
      value = tf.contrib.util.constant_value(expr[1][0].op.outputs[0])
      if value == 1.0:
          return ("#One_minus", expr[2])
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
label_desc: Use image node_id 24 for calling a global function with example usage: one_m_simplify(expr) and returns: None, str,  expr