def atmost(cls, lits, bound=1, top_id=None, encoding=EncType.seqcounter):
        """
            This method can be used for creating a CNF encoding of an AtMostK
            constraint, i.e. of :math:`\sum_{i=1}^{n}{x_i}\leq k`. The method
            shares the arguments and the return type with method
            :meth:`CardEnc.atleast`. Please, see it for details.
        """

        if encoding < 0 or encoding > 9:
            raise(NoSuchEncodingError(encoding))

        if not top_id:
            top_id = max(map(lambda x: abs(x), lits))

        # we are going to return this formula
        ret = CNFPlus()

        # MiniCard's native representation is handled separately
        if encoding == 9:
            ret.atmosts, ret.nv = [(lits, bound)], top_id
            return ret

        # saving default SIGINT handler
        def_sigint_handler = signal.signal(signal.SIGINT, signal.SIG_DFL)

        res = pycard.encode_atmost(lits, bound, top_id, encoding)

        # recovering default SIGINT handler
        def_sigint_handler = signal.signal(signal.SIGINT, def_sigint_handler)

        if res:
            ret.clauses, ret.nv = res

        return ret
This method can be used for creating a CNF encoding of an AtMostK
            constraint, i.e. of :math:`\sum_{i=1}^{n}{x_i}\leq k`. The method
            shares the arguments and the return type with method
            :meth:`CardEnc.atleast`. Please, see it for details.