code: def call_visitor(fort_node):
      """Calls the AST Visitor on the Module
  
      This function is used to call the AST visitor for a program or module
      It imports all the required modules and calls the visit() function
      on the given node
  
      Parameters
      ==========
  
      fort_node : LFortran ASR object
          Node for the operation for which the NodeVisitor is called
  
      Returns
      =======
  
      res_ast : list
          list of SymPy AST Nodes
  
      """
      v = ASR2PyVisitor()
      v.visit(fort_node)
      res_ast = v.ret_ast()
      return res_ast
  
label_desc: Use image node_id 1 for calling a global function with example usage: call_visitor(fort_node) and returns: res_ast