class_docstr: Visitor to replace nodes.
class_docstr_tok: ["Visitor","to","replace","nodes","."]
code: def __init__(self, old, new):
      self.old = old
      self.new = new
  
file_path: turicreate/src/python/turicreate/meta/asttools/mutators/replace_mutator.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import _ast
  from ...asttools.visitors import Visitor
label_desc: Use image node_id 1 to create a new Replacer object from inherited base classes: Visitor with example: obj = Replacer(old, new)