code: def get_attribute(self, node, column):
          
  
          if column > 0 and column < len(self.__horizontal_headers):
              return node.get(self.__horizontal_headers[self.__horizontal_headers.keys()[column]], None)
docs: Returns the given Node attribute associated to the given column.
  
          :param node: Node.
          :type node: AbstractCompositeNode or GraphModelNode
          :param column: Column.
          :type column: int
          :return: Attribute.
          :rtype: Attribute