两个list单独print结果正确, 同时print结果不对

#L = [-5, 0, 5, 15, 25]

L1 = []

#for x in L:

# a = x

# L1.append(a*a)

# print L1

# print sum(L1)

def square_of_sum(L):

for x in L:

a = x

L1.append(a*a)

return sum(L1)

print square_of_sum([1, 2, 3, 4, 5])

print square_of_sum([-5, 0, 5, 15, 25])

weixin_慕码人1021205

2019-10-27

源自：初识Python 7-3

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1 回答

慕虎9037580
2019-10-27

因为你运行完第一个print的时候L1=[55]，运行下一个print把这个55给加进去了。下面这么写就可以了

def square_of_sum(L):
    L1 = []

    for x in L:

        a = x

        L1.append(a*a)

    return sum(L1)
print square_of_sum([1, 2, 3, 4, 5])

print square_of_sum([-5, 0, 5, 15, 25])