8. Part of the Whole


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/4?curriculum_id=4f89dab3d788890003000096#


I keep getting the error message "Oops, try again. get_class_average([lloyd]) returned 85.85 instead of 80.55 as expected." This happened for alice as well.


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"])
    grade = (0.1 * homework) + (0.3 * quizzes) + (0.6 * tests)
    return grade

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"

results = []
students = [lloyd, alice, tyler]

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


#2

Why is results=[] outside?


#3

I had been moving things around in an effort to get it to work. When I move results = [] inside the function, it says that it works, but doesn't display anything.


#4

Well...returning things doesn't necessarily display things into the console (it is just for functions to give a value but doesn't print). If you want, you can print by calling the function and using the print statement.

eg

students = [lloyd, alice, tyler]

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

print get_class_average(students)

#5

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.