Python上写代码或写代码有问题吗？

Question

我想用 note_calculate 从 Folder.txt 计算 class' 个音符。我也可以计算成绩。计算后，我插入列表（称为allnames）。之后，我将该列表中的信息保存到一个名为 Namesandnotes.txt 的新 txt 文件夹中。问题现在开始了。我想在 .txt 文件夹中写入 Passed Students 和 Failed Students。 "CC"高年级写Passed Students.txt，低年级写Failed Students.txt。但是在代码中，我不能写从 Namesandgrades.txt 到 Passed 和 Failed 的姓名和成绩。那是我的问题。

def note_calculate(line):
    line = line[:-1]
    list1 = line.split(",")
    name = list1[0]
    note1 = int(list1[1])
    note2 = int(list1[2])
    final = int(list1[3])
    son = note1 * (3/10) + note2 * (3/10) + final * (4/10)
    passed = []
    failed = []

    if (son >= 90):
        grade = "AA"
    elif (son >= 85):
        grade = "BA"
    elif (son >= 80):

        grade = "BB"
    elif (son >= 75):

        grade = "CB"
    elif (son >= 70):

        grade = "CC"
    elif (son >= 65):

        grade = "DC"
    elif (son >= 60):

        grade = "DD"
    elif (son >= 55):

        grade = "FD"
    else:
        grade = "FF"
    return name +","+ grade



with open("Folder.txt","r", encoding="utf-8") as file:
    allnames = list()
    for i in file:
        allnames.append(note_calculate(i))

    with open("Namesandnotes.txt","r+", encoding = "utf-8") as file2:

        for a in allnames:
            file2.write(a + "\n")

with open("Namesandnotes.txt","r", encoding="utf-8") as file3:
    passed = list()
    failed = list()
    text = file3.read()
    print(text)
    for line in file3:
        line = line[:-1]
        line_element = line.split(",")

        if (line_element[1] == "AA"):
            passed.append(line_element[1] + "\n")
        elif (line_element[1] == "BA"):
            passed.append(line_element[1] + "\n")
        elif line_element[1] == "BB":
            passed.append(line_element[1] + "\n")
        elif line_element[1] == "CB":
            passed.append(line_element[1] + "\n")
        elif line_element[1] == "CC":
            passed.append(line_element[1] + "\n")
        else:
            failed.append(line_element[1] + "\n")


    with open("PassedStudents.txt","r+",encoding="utf-8") as file4:
        for x in passed:
            file4.write(x + "\n")
    with open("FailedStudents.txt", "r+", encoding="utf-8") as file5:
        for c in failed:
            file5.write(c + "\n")

Answer 1

问题是text = file3.read()。完成此操作后，光标位于文件末尾，因此稍后当您逐行遍历 file3 时，文件末尾没有任何内容可读，也没有任何内容可写。只需删除那一行，它就可以工作了。

为了进一步调试，我还建议在其他地方打印出来，这样你就可以看到你的代码实际进入了哪些条件和循环。

Python上写代码或写代码有问题吗？

Is there a problem with writing codes or writing codes on Python?

python

file-management