Fixed #10184: QueryDicts with multiple values can now be safely pickled. Thanks, Alex Gaynor.

                             copy.deepcopy(value, memo))

        return result

    def __getstate__(self):

        obj_dict = self.__dict__.copy()

        obj_dict['_data'] = dict([(k, self.getlist(k)) for k in self])

        return obj_dict

    def __setstate__(self, obj_dict):

        data = obj_dict.pop('_data', {})

        for k, v in data.items():

            self.setlist(k, v)

        self.__dict__.update(obj_dict)

    def get(self, key, default=None):

        """

        Returns the last data value for the passed key. If key doesn't exist

# Pickling a QueryDict #

########################

>>> import pickle

>>> q = QueryDict('')

>>> q1 = pickle.loads(pickle.dumps(q, 2))

>>> q == q1

True

>>> q = QueryDict('a=b&c=d')

>>> q1 = pickle.loads(pickle.dumps(q, 2))

>>> q == q1

True

>>> q = QueryDict('a=b&c=d&a=1') 

>>> q1 = pickle.loads(pickle.dumps(q, 2))

>>> q == q1 

True

######################################

# HttpResponse with Unicode headers  #