如何根据第一个用户输入有可变数量的用户输入

Question

我已经创建了一个计算学生平均水平的程序，我希望根据用户输入来创建输入，例如:如果用户键入5，它就会创建5个输入。

print('Average of students')

def student_average():
    while True:
        try:
            # I want to create inputs depending on the user's input in the following question:
            number_of_qualifications = int(input('What is the number of qualifications?: '))
            qualification_1 = float(input('What is the first qualification?: '))
            qualification_2 = float(input('What is the second qualification?: '))
            qualification_3 = float(input('What is the third qualification?: '))
            qualification_4 = float(input('What is the fourth qualification?: '))
            break
        except:
            print('This is not an option')
    sum = (qualification_1 + qualification_2 + qualification_3 + qualification_4)
    average = (sum / 4)
    print(average)

student_average()

Answer 1

你需要用一个循环。我已经删除了try/except，如果你愿意，你可以把它加回去。

def student_average():
    number_of_qualifications = int(input('What is the number of qualifications?: '))
    sumx = 0
    for _ in range(number_of_qualifications):
        sumx += float(input('What is the next qualification?: '))
    return sumx / number_of_qualifications

print(student_average())

Answer 2

我已经修改了你的代码，所以除了尝试之外的功能被保留了下来。

def student_average():
    total, c = 0,0
    number_of_qualifications = int(input('What is the number of qualifications?: '))
    while True:
        try:
            # I want to create inputs depending on the user's input in the following question:
            total += float(input(f'{c+1} What is the qualification?: '))
            c += 1
            if c == number_of_qualifications:
                break
        except:
            print('This is not an option')
    average = (total / number_of_qualifications)
    print(average)
    
print('Average of students')
student_average()

输出：

Average of students
What is the number of qualifications?:  3
1 What is the qualification?:  4
2 What is the qualification?:  5
3 What is the qualification?:  a
This is not an option
3 What is the qualification?:  6
5.0

Answer 3

请不要使用"sum“作为变量，因为它是Python保留的单词。如果以前使用过它，则必须重新启动内核。

def student_average():
    cnt = 1
    total_list = []
    number_of_qualifications = int(input('What is the number of qualifications?: '))
    while len(total_list) < number_of_qualifications:
        try:
            # I want to create inputs depending on the user's input in the following question:
            total_list.append(float(input(f'{cnt}. What is the qualification?: ')))
            cnt += 1
        except:
            print('This is not an option')
    return (sum(total_list) / number_of_qualifications)
    
print('Average of students =', student_average())

输出

What is the number of qualifications?:  5
1. What is the qualification?:  10
2. What is the qualification?:  20
3. What is the qualification?:  30
4. What is the qualification?:  aa
This is not an option
4. What is the qualification?:  40
5. What is the qualification?:  50
Average of students = 30.0