code: def __init__(self, ctx_types=(ast.Load, ast.Store)):
      if not isinstance(ctx_types, (list, tuple)):
          ctx_types = (ctx_types,)
  
      self.ctx_types = tuple(ctx_types)
  
file_path: turicreate/src/python/turicreate/meta/asttools/visitors/symbol_visitor.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from ...asttools.visitors import Visitor
  import ast
label_desc: Use image node_id 1 to create a new SymbolVisitor object from inherited base classes: Visitor with example: obj = SymbolVisitor(ctx_types)