Question

我的任务中有一个问题，我使用for循环来比较两个列表，一个是答案键，另一个是学生答案列表，产生一个+4的分数给出正确的响应，-1表示不正确，0表示省略的响应。它工作正常，直到它到达循环的最后一个元素。我知道程序正在“读取”最后的元素，因为我以前打过它们，但它没有正确调整分数，实际上是减去一个点，无论答案如何。我无法弄清楚出了什么问题，特别是因为它只是最后一部分。

以下是我的代码的相关部分：

    #As we go over each line, we add to the student counter to keep track of the number of students.
    #We use the split function to turn each line of the file into a list that we can use.
    for line in open_file:
        students += 1
        student_ans = line.split(",")

        #The score tracker keeps track of total score.
        score_tracker = 0

        #This for loop iterates over each value in the list, comparing to the answer key.
        for n in range(number_ans):
            a = answerkey[n]
            b = student_ans[n+1]

            #A series of if/elif/else statements give and take points according to answers.
            if a == b:
                score_tracker += 4
            elif b == "":
                score_tracker += 0
            else: 
                score_tracker -= 1
        print(score_tracker)

任何帮助都将不胜感激。

for循环中的最后一个元素不完全迭代

0 个答案: