gist.py

@api_call
def get_event_stats(request):
    try:
        filters = {}
        if 'when_min' in request.GET:
            when_min = utils.str_time_to_unix(request.GET['when_min'])
            filters['when__gte'] = when_min

        if 'when_max' in request.GET:
            when_max = utils.str_time_to_unix(request.GET['when_max'])
            filters['when__lte'] = when_max

        service = request.GET.get("service", "nova")
        rawdata = _rawdata_factory(service)
        if filters:
            rawdata = rawdata.filter(**filters)
        events = rawdata.values('event').annotate(event_count=Count('event'))
        events = list(events)

        if 'event' in request.GET:
            event = request.GET['event']
            default = {'event': event, 'event_count': 0}
            events = [x for x in events if x['event'] == event] or [default, ]

        return {'stats': events}
    except (KeyError, TypeError):
        raise BadRequestException(message="Invalid/absent query parameter")
    except (ValueError, AttributeError):
        raise BadRequestException(message="Invalid format for date (Correct "
                                          "format should be %YYYY-%mm-%dd)")