Question

控制台回复说未定义全局名称“average”。完整的信息是：

get_class_average([alice])导致错误：全局名称“average” 未定义

我找不到原因，但我也要说我刚刚开始学习python。

以下代码......

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!

def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    homework = homework * 0.1
    quizzes = quizzes * 0.3
    tests = tests * 0.6
    return homework + quizzes + tests

def get_class_average(students):
    results = []
    for student in students:
        results.append(get_average(student))
    return average(results)

Answer 1

python中没有内置average函数，但您可以使用此函数：

def average(iterable):
    li = list(iterable)  # now you can supply generator expressions and stuff like that too
    return float(sum(li)) / len(li)

它表明get_average不是全局值，但确实如此

1 个答案: