Part of whole problem


#1

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

Oops, try again.
get_class_average([alice]) returned the correct result, but it
modified the class list or one of the student dictionaries, that's a
problem if using the function more than once!

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

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

#2

Your error message says what's wrong, do you have any further questions?