Question

我对编程很新，并且只做了一个月。目前我正在尝试获取用户输入，将其存储在列表中，并将该列表传递给函数。我在使用列表作为我的函数的参数（最后一行代码）时遇到了麻烦。提前谢谢！

grade_list = []
percentages = 0

while True:
    percentages = input("Enter some numbers here: ")
    if percentages == "done":
        break
    grade_list.append(percentages)

print(grade_list)


def gpaCalc(marks):
    gpaList = []
    for grade in marks: #sorts data
        if grade <= 49.99:
            grade = 0.00

        elif 50 <= grade <= 52.99:
            grade = 0.70

        elif 53 <= grade <= 56.99:
            grade = 1.00

        elif 57 <= grade <= 59.99:
            grade = 1.30

        elif 60 <= grade <= 62.99:
            grade = 1.70

        elif 63 <= grade <= 66.99:
            grade = 2.00

        elif 67 <= grade <= 69.99:
            grade = 2.30

        elif 70 <= grade <= 72.99:
            grade = 2.70

        elif 73 <= grade <= 76.99:
            grade = 3.00

        elif 77 <= grade <= 79.99:
            grade = 3.30

        elif 80 <= grade <= 84.99:
            grade = 3.70

        elif 85 <= grade <= 89.99:
            grade = 3.90

        elif 90 <= grade <= 100:
            grade = 4.00

        gpaList.append(grade) #gathers data into list
        gpaList.sort()

    return gpaList

print (gpaCalc(PROBLEM))

Answer 1

在最后一个print行之前，定义您的商标列表，例如marks = [70, 68, 50, 89, ...]并将其传递给函数调用中的gpaCalc：

print(gpaCalc(marks))

请注意，Python convention表示您不应在标识符中使用驼峰大小写;请改为使用下划线：gpa_calc

编辑：我错过了问题的重点！要获取用户的输入，请使用循环：

def get_user_input():
    grades = []

    while True:
        # take input
        value = ... # figure it out

        if value == 'q':
            break

        try:
            # do basic validation here
            grades.append(int(value))

            # might be a good idea to check the range too…
        except ValueError:
            print("This is not a valid grade!")

    return grades

如果您想要解释，请发表评论！

Answer 2

您可以传递一个列表，就像将它正常传递给任何函数一样，只需始终确保通过正确索引访问列表中的项目，而不是计算整个列表。请改用以下内容：

def gpaCalc(marks):
    gpaList = []
    for grade in marks[0]: #sorts data

        if grade <= 49.99:
            grade = 0.00

        elif 50 <= grade <= 52.99:
            grade = 0.70

        elif 53 <= grade <= 56.99:
            grade = 1.00

        elif 57 <= grade <= 59.99:
            grade = 1.30

        elif 60 <= grade <= 62.99:
            grade = 1.70

        elif 63 <= grade <= 66.99:
            grade = 2.00

        elif 67 <= grade <= 69.99:
            grade = 2.30

        elif 70 <= grade <= 72.99:
            grade = 2.70

        elif 73 <= grade <= 76.99:
            grade = 3.00

        elif 77 <= grade <= 79.99:
            grade = 3.30

        elif 80 <= grade <= 84.99:
            grade = 3.70

        elif 85 <= grade <= 89.99:
            grade = 3.90

        elif 90 <= grade <= 100:
            grade = 4.00

        gpaList.append(grade) #gathers data into list
        gpaList.sort()

    return gpaList

grade_list = []
percentages = 0

while True:
    percentages = input("Enter some numbers here: ")
    if percentages == "done":
        break
    grade_list.append(percentages)

print(gpaCalc(grade_list))

Answer 3

保持检查＆＃34;完成＆＃34;原样。如果没有完成，那么转换浮动。

while True:
    percentages = input("Enter some numbers here and 'done' to exit:")
    if percentages == "done":
        break

    try:
        grade_list.append(float(percentages))
    except ValueError:
        pass

...排序

    for grade in marks: #sorts data
        .....

        gpaList.append(grade) #gathers data into list

    #also, sort outside the loop, when done, not each time.
    gpaList.sort()

    return gpaList

如何使用python

3 个答案: