utf8-friendly dumpdata management command (no escape symbols) #4

""" pretty serialization
    original from <http://djangosnippets.org/snippets/2397/>
    revised for Django 1.9
"""
import json
from django.core.serializers.json import (  # pylint:disable=W0611
    Serializer as JSONSerializer,
    Deserializer)  # @UnusedImport
from django.core.serializers.json import DjangoJSONEncoder


class Serializer(JSONSerializer):
    """ utf8-friendly dumpdata management command """
    def end_object(self, obj):
        indent = self.options.get("indent")
        if not self.first:
            self.stream.write(",")
            if not indent:
                self.stream.write(" ")
        if indent:
            self.stream.write("\n")
        json.dump(self.get_dump_object(obj), self.stream, ensure_ascii=False,
                  cls=DjangoJSONEncoder, **self.json_kwargs)
        self._current = None  # pylint:disable=W0201