python - 如何修复分数值的打印？

Question

该程序应显示:

Here are your grades
Math score is 100
Science score is 90
Reading score is 70

Average grade score is 86.66

但是使用我的代码，它显示的是:

Here are your grades:
Math score is 100.0
Sciencee score is 95.0
Reading score is 86.66666666666667
The average score is 86.66666666666667

所以基本上平均值是正确的，但现在分数不正确。

gradesFile = open("grades.txt","r")

#Establishes the variables
total = 0
numberOfLines = 0
lines = 0
print('Here are your grades:','\n')

# Creates a loop that will print out each score, until there aren't anymore
# scores to read. For example:
#Math score is 100
#Science score is 90
#and so on.
for line in gradesFile:
   numberOfLines += 1
   lines = line.strip()
   total += float(gradesFile.readline())
   score = total / numberOfLines
   print(lines + ' score is', score)

gradesFile.close
average = float(total) / (numberOfLines)
print('The average score is', average)

grades.txt 文件如下所示:

数学

100.0

科学

90.0

阅读

70.0

Answer 1

您的分数本质上是滚动平均值。不需要，直接打印即可:

for line in gradesFile:
   numberOfLines += 1

   lines = line.strip()

   score =  float(gradesFile.readline())

   total += score

   print(lines + ' score is', score)