def not_flagvar(self, node):
        name = node.value
        try:
            value = self._vars[name]
        except __HOLE__:
            raise ValueError("Unknown flag variable %s" % name)
        else:
            return not _LIT_BOOL[value]
dataset/ETHPy150Open cournape/Bento/bento/parser/visitor.py/Dispatcher.not_flagvar