def maturity_date(self, value):
        """
        The date on which the asset matures and no longer holds value
        :param value:
        :return:
        """
        self._maturity_date = parse(value).date() if isinstance(value, type_check) else value
def maturity_date ( self , value ) : self . _maturity_date = parse ( value ) . date ( ) if isinstance ( value , type_check ) else value
The date on which the asset matures and no longer holds value
        :param value:
        :return: