def add(self, name, value):
clone = self._clone()<EOL>clone._qsl = [p for p in self._qsl<EOL>if not(p[<NUM_LIT:0>] == name and p[<NUM_LIT:1>] == value)]<EOL>clone._qsl.append((name, value,))<EOL>return clone<EOL>
Append a value to multiple value parameter.