Compute multiple model properties in one call

[Navi Sr]

Hi! I have some Django Model which has two properties:
class M(Model):
    @property
    def p1(self):
        return process_result(SomeModel.objects.filter(val_gt=1))

    @property
    def p2(self):
        return process_result(SomeModel.objects.filter(val_lt=1))



And both used in Django Admin list_lisplay = ('p1','p2',) I want to replace 
2 database queries with 1, something like this

class M(Model):

    def some_hook(self): 
        res = SomeModel.objects.all()
        self.p1 = process_result(filter(lambda l:l.val > 10, res))
        self.p2 = process_result(filter(lambda l:l.val < 10, res))

PS: problem with >10 or <10 is just an example for simplification, I am 
only trying to find a way how to define *multiple properties* with 
performing *one common database query*

Thanks

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