code: def csv(node):
      gen = ConditionalSymbolVisitor()
      gen.visit(node)
      return gen
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from ..visitors import Visitor, visit_children
  from ..visitors.symbol_visitor import get_symbols
  import ast
  from ...utils import py2op
label_desc: Use image node_id 1 for calling a global function with example usage: csv(node) and returns: gen