如何在JSON字符串中包含注释?

我有一个视图,返回编码为JSON的货件列表...
def get_new_shipments(request):
    # ...
    shipments = Shipment.objects.filter(filter).exclude(**exclude).order_by(order) 
        .annotate(num_bids=Count('bids'), min_bid=Min('bids__amount'), max_bid=Max('bids__amount'))
    return json_response(shipments)

def json_response(data):
    response = HttpResponse(mimetype='application/json')
    serializer = serializers.get_serializer("json")()
    data = list(data)
    serializer.serialize(data, ensure_ascii=False, stream=response)
    return response
但我在JSON的任何地方都没有看到这些注释......如何将它们包含在内?     
已邀请:
这似乎有效:
return HttpResponse(simplejson.dumps(list(shipments.values()), ensure_ascii=False, default=json_formatter), mimetype='application/json')

def json_formatter(obj):
    if isinstance(obj, datetime.datetime):
        return obj.isoformat()
    elif isinstance(obj, Decimal):
        return unicode(obj)
    else:
        raise TypeError, 'Object of type %s with value of %s is not JSON serializable' % (type(obj), repr(obj))
信用     

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