Question

我想用Folder.txt从note_calculate计算一个班级的笔记。我也可以计算成绩。计算之后，我插入列表（称为allnames）。之后，我将信息从该列表中移到名为Namesandnotes.txt的新txt文件夹中。问题现在开始。我想在Passed Students文件夹中写入Failed Students和.txt。 “ CC”和更高的分数应该用Passed Students.txt书写，较低的分数应该用Failed Students.txt书写。但是在代码中，我无法写出从Namesandgrades.txt到通过和失败的名称和等级。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，游标将位于文件的末尾，因此稍后在逐行遍历file3时，在文件末尾将没有任何内容可读取，也不会写入任何内容。只需删除那一行，它应该可以工作。

为了进行进一步的调试，我还建议在其他地方放置打印件，以便您可以查看代码实际输入的条件和循环。

在Python上编写代码或编写代码是否存在问题？

1 个答案: