code: def _get_value(self, node, scope, ctxt, stream):
          
  
          res = self._handle_node(node, scope, ctxt, stream)
  
          if isinstance(res, fields.Field):
              return res._pfp__value
  
          # assume it's a constant
          else:
              return res
docs: Return the value of the node. It is expected to be
          either an AST.ID instance or a constant
  
          :node: TODO
          :returns: TODO