def get(self, select):
        """
        :param select: the variable to extract from list
        :return:  a simple list of the extraction
        """
        if is_list(select):
            return [(d[s] for s in select) for d in self.data]
        else:
            return [d[select] for d in self.data]
def get ( self , select ) : if is_list ( select ) : return [ ( d [ s ] for s in select ) for d in self . data ] else : return [ d [ select ] for d in self . data ]
:param select: the variable to extract from list
        :return:  a simple list of the extraction