8/9 Part of the Whole


#1

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

Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected


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]
}

classlist = [lloyd, alice, tyler]
#classlist.sort()

# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    total = total / len(numbers)
    return total
    
def get_average(student):
    homework = average(student["homework"])
    homework = homework*0.1
    quizzes = average(student["quizzes"])
    quizzes = quizzes*0.3
    tests = average(student["tests"])
    tests = tests*0.6
    return homework + quizzes + tests
    
def get_letter_grade(score):
    if score >= 90:
        return "A"
    elif score >=80 and score < 90:
        return "B"
    elif score >=70 and score < 80:
        return "C"
    elif score >=60 and score < 70:
        return "D"
    else: 
        return "F"

#print get_letter_grade(get_average(lloyd))

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


#2

the function parameter students will hold the list with students, so that is what i would loop over:

for student in students:

and then append the get_average(student) to your results list

Tricky to give the for loop the same variable name as the function parameter


#3

For better understanding and lack of confusion I would advise you to call your global variable students and not,

And having a global variable students it would only be practical that you iterate over your dictionaries using for student in students: not,

After changing those two errors the second argument in this statement,

should then be student and not students


#4

getting following error now:

Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str


#5

We can't see the changes you made, post an updated version of your code


#6

yes Bandit Your solution worked. Thanks


#7

Thanks. May be you told me in short and i couldn't understand.