def lexsort(self, *order):
        """
        The lexical sort order is specified by a list of string
        arguments. Each string is a key name prefixed by '+' or '-'
        for ascending and descending sort respectively. If the key is
        not found in the operand's set of varying keys, it is ignored.
        """
        if order == []:
            raise Exception("Please specify the keys for sorting, use"
                            "'+' prefix for ascending,"
                            "'-' for descending.)")

        if not set(el[1:] for el in order).issubset(set(self.varying_keys)):
            raise Exception("Key(s) specified not in the set of varying keys.")

        sorted_args = copy.deepcopy(self)
        specs_param = sorted_args.params('specs')
        specs_param.constant = False
        sorted_args.specs = self._lexsorted_specs(order)
        specs_param.constant = True
        sorted_args._lexorder = order
        return sorted_args
def lexsort(self, *order):
        """
        The lexical sort order is specified by a list of string
        arguments. Each string is a key name prefixed by '+' or '-'
        for ascending and descending sort respectively. If the key is
        not found in the operand's set of varying keys, it is ignored.
        """
        if order == []:
            raise Exception("Please specify the keys for sorting, use"
                            "'+' prefix for ascending,"
                            "'-' for descending.)")

        if not set(el[1:] for el in order).issubset(set(self.varying_keys)):
            raise Exception("Key(s) specified not in the set of varying keys.")

        sorted_args = copy.deepcopy(self)
        specs_param = sorted_args.params('specs')
        specs_param.constant = False
        sorted_args.specs = self._lexsorted_specs(order)
        specs_param.constant = True
        sorted_args._lexorder = order
        return sorted_args
def lexsort ( self , * order ) : if order == [ ] : raise Exception ( "Please specify the keys for sorting, use" "'+' prefix for ascending," "'-' for descending.)" ) if not set ( el [ 1 : ] for el in order ) . issubset ( set ( self . varying_keys ) ) : raise Exception ( "Key(s) specified not in the set of varying keys." ) sorted_args = copy . deepcopy ( self ) specs_param = sorted_args . params ( 'specs' ) specs_param . constant = False sorted_args . specs = self . _lexsorted_specs ( order ) specs_param . constant = True sorted_args . _lexorder = order return sorted_args
The lexical sort order is specified by a list of string
        arguments. Each string is a key name prefixed by '+' or '-'
        for ascending and descending sort respectively. If the key is
        not found in the operand's set of varying keys, it is ignored.
The lexical sort order is specified by a list of string arguments . Each string is a key name prefixed by + or - for ascending and descending sort respectively . If the key is not found in the operand s set of varying keys it is ignored .