Stuck on 9.9 How Is Everybody Doing


#1

I have checked other threads and have still not found what is wrong.

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

File python in line 57 , in module.

File python line 54, in get_class_average

File python line 30 in get_average

TypeError: string indices must be integers not strings


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]
}

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

# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    average = total / len(numbers)
    return average
    
def get_average(student):
    homework = average(student['homework'])
    quizzes = average(student['quizzes'])
    tests = average(student['tests'])
    sum = (homework * .10) + (quizzes * .30) + (tests * .60)
    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'

grade = get_average(lloyd)
print get_letter_grade(grade)

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


#2

Solved. I had the list "students" as strings.


#3

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