Cannot solve the error in the console


#1



https://www.codecademy.com/en/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096


Error: Traceback (most recent call last):
File "python", line 52, in
File "python", line 49, in get_class_average
File "python", line 27, in get_average
TypeError: string indices must be integers, not str


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)
    total=total/len(numbers)
    return total
def get_average(student):
    homework=average(student["homework"])
    quizzes=average(student["quizzes"])
    tests=average(student["tests"])
    return 0.1*homework+0.3*quizzes+0.6*tests
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"
    get_letter_grade(get_average(lloyd))
    return get_letter_grade(get_average(lloyd))

students=[lloyd,alice,tyler]
def get_class_average(students):
    results=[]
    for student in students:
        results= results.append(get_average(student))
    return average(results)
students=[lloyd,alice,tyler]
print get_class_average(students)
print get_letter_grade(get_class_average(students))


#2

There's something redundant in one of your functions...

My question is, why did you put those two lines there?

I purposely only write down vaguely what you need to do here. It's actually really simple, but I have no idea why you write that down there in the first place...


#3

Hey, I am not sure which lines you are talking about-- could you elaborate? Though, my code now works, since i replaced:
def get_class_average(students):
results=[]
for student in students:
results= results.append(get_average(student))
return average(results)

With:

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


#4

That was what I saw. But yeah, there's the

results = results.append....

problem too. Thankfully you found it out.

Honestly, I didn't notice that particular mistake though, hahaha. I didn't run your code, but I just backtracked the error, and saw those particular two lines that didn't make sense to be there for me.


#5

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