code: def visit_Module(self, code):
      if not self.enabled:
          return code
      # if not isinstance(code, ast.Module):
      # recursively called...
      #    return generic_visit(self, code)
      last = code.body[-1]
      if isinstance(last, Expr):
          code.body.pop()
          code.body.append(
              Assign([Name("ret-tmp", ctx=Store())], value=last.value)
          )
          ast.fix_missing_locations(code)
          ret = Expr(value=Name("ret-tmp", ctx=Load()))
          ret = ast.fix_missing_locations(ret)
          self.mapping["__ret__"] = ret
      else:
          self.mapping["__ret__"] = ast.parse("None").body[0]
      self.mapping["__code__"] = code.body
      tpl = ast.fix_missing_locations(self.template)
  
      tx = copy.deepcopy(tpl)
      tx = self.mangler.visit(tx)
      node = self.generic_visit(tx)
      node_2 = ast.fix_missing_locations(node)
      if self.debug:
          print("---- Transformed code ----")
          print(ast.unparse(node_2))
          print("---- ---------------- ----")
      return node_2
  
file_path: catboost/contrib/python/ipython/py3/IPython/core/magics/ast_mod.py
imports: from ast import NodeTransformer, Store, Load, Name, Expr, Assign, Module
  import ast
  import copy
  from typing import Dict, Optional
label_desc: Use image node_id 3 for calling the ReplaceCodeTransformer obj's underlying member method code with example usage: obj.visit_Module(code) and returns: node_2, code