TypeError: string indices must be integers, not str


#1
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)
    
    avg = total / len(numbers)
    return avg
    
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    
    s = (.1 * homework) + (.3 * quizzes) + (.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 = []
    for student in students:
        results.append(get_average(student))
    return average(results)

students = ["lloyd", "alice", "tyler"]`indent preformatted text by 4 spaces`

c_avg = get_class_average(students)

print c_avg
print get_letter_grade(c_avg)

#2

Figured it out.....

My list of students should not be:

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

I had to remove the quotations:

students = [lloyd, alice, tyler]


#3

Yes I made the same mistake, the list of students should be the name of the associated dictionaries not the strings