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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def filter_active(self, *args, **kwargs):
 """ Return only the 'active' hits. How you count a hit/view will depend on personal choice: Should the same user/visitor *ever* be counted twice? After a week, or a month, or a year, should their view be counted again? The defaulf is to consider a visitor's hit still 'active' if they return within a the last seven days.. After that the hit will be counted again. So if one person visits once a week for a year, they will add 52 hits to a given object. Change how long the expiration is by adding to settings.py: HITCOUNT_KEEP_HIT_ACTIVE = {'days' : 30, 'minutes' : 30} Accepts days, seconds, microseconds, milliseconds, minutes, hours, and weeks. It's creating a datetime.timedelta object. """

        grace = getattr(settings, 'HITCOUNT_KEEP_HIT_ACTIVE', {'days': 7})
        period = timezone.now() - timedelta(**grace)
        return self.filter(created__gte=period).filter(*args, **kwargs)