def is_valid_table(self, table):
        if self.user_is_root():
            # Verify table existence
            if not self.tables.iterkeys() in table:
                self.writeln( """%s: can\'t initialize iptables table \'%s\': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.""" % (command_iptables.APP_NAME, table) )
                self.exit()
            else:
                # Exists
                return True
        else:
            self.no_permission()

        # Failed
        return False
dataset/ETHPy150Open basilfx/kippo-extra/kippo_extra/commands/iptables.py/command_iptables.is_valid_table/swapped operands of `in`