code: def ast_values(node):
      return [getattr(node, field, None) for field in node._fields]
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from ...asttools import Visitor
  import sys
  import _ast
  from warnings import warn
label_desc: Use image node_id 4 for calling a global function with example usage: ast_values(node) and returns: unknown