Python 3 中的循环和条件语句问题 [重复]

Question

我是一个刚入门的程序员，我正在尝试为大学教授创建一个成绩簿程序，以便他可以输入他的期中和期末考试成绩，并获得每个学生每门课程的平均成绩和字母成绩.该程序应该获取课程编号、课程级别、考试数量和学生信息（ID 和考试分数）的输入。

起初我想创建一个以 ID 为键，平均值为值的字典，但后来似乎不起作用，所以我开始尝试创建带条件的 while 循环。

基本上代码是一团糟，我不确定我做错了什么。我已经在网上观看了教程并阅读了很多东西，但我正在为此碰壁。一方面，我在第 22 行使用 elif 语句不断收到 Invalid Syntax 错误。任何人都可以为此提供任何帮助，我们将不胜感激！对于我在这里遗漏的任何内容提前道歉 - 我对这一切都很陌生。

谢谢！

print("Hello! Welcome to your Grading Program!\n")
courseCode = input("Please enter the course code : ")
courseLevel = input("Please enter the course level : ")
numberExams = float(input("Please enter the number of exams : "))
enterStudents = input("Would you like to input a student, Yes or No? : ")

student = 0

while enterStudents == "Yes" or "yes" or "y" or "Y" :
    if courseLevel == "undergrad" or "Undergrad" or "undergraduate" or "u" or "U":
        for student in range(int(numberExams)):
            ID = input("Please enter student ID: ")
            midterm = int(float(input("Please enter midterm score: ")))
            finalExam = int(float(input("Please enter final exam score: ")))
            undAverage = (midterm * .60) + (finalExam * .40)
    elif courseLevel == "grad" or "Grad" or "Graduate" or "g" or "G":
        for student in range(int(numberExams)):
            ID = input("Please enter student ID: ")
            midterm = int(float(input("Please enter midterm score: ")))
            finalExam = int(float(input("Please enter final exam score: ")))
            undAverage = (midterm * .30) + (finalExam * .70)               
elif enterStudents == "No" or "no" or "n" or "N" :
    print("\nSee you next time!")
else:
    enterStudents == "" :
        input("Invalid Entry! Would you like to input a student, Yes or No?:")

def Grade():
    for letter in Grade:
        total = 100
    for letter in Grade(A,B,C,D,E,F):
        if undGrade == "A":
                    undAverage >= range(85,101)
        elif undGrade == "B":
                    undAverage >= range(70,85)
        elif undGrade == "C":
                    undAverage >= range(55,70)
        elif undGrade == "D":
                    undAverage >= range(40,55)
        elif undGrade == "F":
                    undAverage >= range(0,40)
    print(Grade)

Answer 1

您的 or 陈述应该是“完整的”。

elif courseLevel == "grad" or "Grad" or "Graduate" or "g" or "G":

需要成为：

elif courseLevel == "grad" or courseLevel == "Grad" or courseLevel == "Graduate" or courseLevel == "g" or courseLevel == "G":

更简单的做法是：

elif courseLevel.lower() in ['grad', 'graduate', 'g']:

.lower(): 忽略区分大小写的单词

in []: 在列表/数组中查找项目

此外（归功于@Ashwini），while-elif 组合不存在。