class Customer(object ):
def __init__(self, idnumber, review):
self.idnumber = idnumber
self.reviews = [review]
def addReview(self, review):
self.reviews.ap pend(review)
def averageGrade(se lf):
tot = 0
for review in self.reviews:
tot += review.grade
return tot / len(self.review s)
def av_grade(self):
return reduce(lambda x, y: x.grade+y.grade , self.reviews)
now,the function is pointless and incorrect but av_grade doesn't work.
why can't i use reduce like this?
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