以下是已输入分数的3名学生名单的代码,我想计算个人和班级平均分。平均函数为各个学生返回正确的值,但get_class_average函数不返回正确的值。这是python中的codecademy课程,在线编译器显示以下错误: 哎呀,再试一次。 get_class_average([alice])按预期返回83.8666666667而不是91.15。 有什么问题?没有语法错误。
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 average(numbers):
total = sum(numbers)
total = float(total)
return total/len(numbers)
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
s = 0.1*homework + 0.3*quizzes + 0.6*tests
return s
def get_letter_grade(score):
if score>=90:
return "A"
elif score>=80:
return "B"
elif score>=70:
return "C"
elif score>=60:
return "D"
else:
return "F"
print get_letter_grade(get_average(lloyd))
def get_class_average(students):
results = []
results.append(get_average(lloyd))
results.append(get_average(alice))
results.append(get_average(tyler))
return(average(results))
答案 0 :(得分:1)
您忘记了打印或返回:
def get_class_average(students):
results = []
results.append(get_average(lloyd))
results.append(get_average(alice))
results.append(get_average(tyler))
print average(results)
OR
def get_class_average(students):
results = []
results.append(get_average(lloyd))
results.append(get_average(alice))
results.append(get_average(tyler))
return average(results)
没有打印,它不会打印结果。没有返回,它不会返回结果。
答案 1 :(得分:0)
这里有两个错误:
首先,在函数return
的末尾需要get_class_average()
。这就是函数无法正确返回的原因。
其次,函数get_class_average()
接受参数students
。但是,似乎students
没有使用它。