For a big nbr of it might matter? Is av_grade O(n*2) and the first O(n) when it comes to adding or is "sum x for x in y" just traversing the list ones, accumulating the values, it doesnt first build the list and then travese it for sum?
def averageGrade(self):
tot = 0
for review in self.reviews:
tot += review.grade
return tot / len(self.reviews)
def av_grade(self):
return sum(review.grade for review in self.reviews) / \
len(self.reviews)
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