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實現(xiàn)讀取csv文件，文件里面是有限個百分數(shù)成績(99.6、76.8等等)導(dǎo)出GPA 和等級

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代碼是這樣，但是報錯了，在score = float(sc)這行就報錯了，下面有沒有錯誤還不知道，大佬能幫看看嘛？

錯誤代碼：TypeError: 'float' object is not subscriptable

import pandas as pd

data = pd.read_csv("scores.csv")

grade = []

GPA = []

JD = (score-50)/10

GPA.append(JD)

sc = "%6.1f" % score

score = float(sc)

n = print(score)

for i in (1,n):

if score[i]>= 95:

grade = "A+"

elif score[i] >= 90:

grade = "A"

elif score[i] >= 85:

grade = "A-"

elif score[i] >= 82:

grade = "B+"

elif score[i] >= 78:

grade = "B"

elif score[i] >= 75:

grade = "B-"

elif score[i] >= 71:

grade = "C+"

elif score[i] >= 66:

grade = "C"

elif score[i] >= 62:

grade = "C-"

elif score[i] >= 60:

grade = "D"

else:

grade = "F"

grade.append(grade)

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