8. Part of the Whole


#1



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

It says this: Oops, try again.
get_class_average([alice]) resulted in an error: list 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)
    hi = float(total) / len(numbers)
    return hi
    
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"
print get_letter_grade(get_average(lloyd))
print get_letter_grade(get_average(alice))
print get_letter_grade(get_average(tyler))

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


#2

Think this through for a minute. What is the purpose of iterating the object, students? To examine one student at a time.

Do we wish to append the student dictionary? No. We need to append the average for each student.


#3

Wait, so, just change the student in results.append to average?


#4

Oh wait now I see what you mean. Thanks!