def get_customer_points_ total self customer cache getattr self _total

def get_customer_points_total(self, customer):
    cache = getattr(self, '_total_points_cache', {})
    if customer.id not in cache:
    	cache[customer.id] = customer.customerpoints_set.total()
        self._total_points_cache = cache
    
    return cache[customer.id]
    
    
CustomerAdmin.get_customer_points_total = get_customer_points_total