How is Everybody Doing?


#1




Traceback (most recent call last):
File "python", line 45, in
File "python", line 50, in get_class_average
File "python", line 28, in get_average
TypeError: string indices must be integers, not str


Finally, print out the result of calling get_class_average with your students list. Your students should be [lloyd, alice, tyler].
Then, print the result of get_letter_grade for the class's average.


Replace this line with your code. 
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"])
    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))


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

If you have a text editor handy or a sandbox with line numbers, copy your code and paste it in to get a bearing on the trace route shown above. This will help you follow the flow and examine the objects.

HInt: One object that is in error is the students list. They should not be strings, but identifiers.


#3

GOtcha, thanks mate.
I tried doing that and it worked.


#4

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