.9 How is Everybody doing?


#1



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

It gives me the following 2 errors. The first being:

B
Traceback (most recent call last):
File "python", line 53, in
File "python", line 50, in get_class_average
File "python", line 28, in get_average
TypeError: string indices must be integers, not str

The second error being:

Oops, try again. Did you remember to print the average of the class? It looks like "83.8666666667" wasn't printed.


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)
    total = total / len(numbers)
    return total

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

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)
    
print get_class_average(lloyd)
print get_class_average(alice)
print get_class_average(tyler)

print get_letter_grade(students)


#2

Hi @megasolver00822,

Instead of this ...

print get_class_average(lloyd)
print get_class_average(alice)
print get_class_average(tyler)

... you need to pass the list of students to the get_class_average function.

When calling the get_letter_grade function, you need to pass it a numerical grade. Instead of passing it students, as you do here ...

print get_letter_grade(students)

... pass it the numerical class average that results from passing students to the get_class_average function.


#3

Thank you so much! I figured it out with your help :slight_smile:


#4