Build the results.

def __buid_result(self, varBinds):
        """Build the results."""
        ret = {}
        for name, val in varBinds:
            if str(val) == '':
                ret[name.prettyPrint()] = ''
            else:
                ret[name.prettyPrint()] = val.prettyPrint()
                # In Python 3, prettyPrint() return 'b'linux'' instead of 'linux'
                if ret[name.prettyPrint()].startswith('b\''):
                    ret[name.prettyPrint()] = ret[name.prettyPrint()][2:-1]
        return ret