8. Part of the whole


#1



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

Hello! I was hoping someone might be able to pick out why I am receiving this error message

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

I'm thinking it may have to do with something earlier in my code so I linked it all below. Any feedback would help.


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)/len(numbers)
    return total
 
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests =  average(student["tests"])
    return (homework *.10) + (quizzes *.3) + (tests *.6)
    
def get_letter_grade(score):
    if score >=90.0: 
        return "A"
    elif score >=80.0: 
        return "B"
    elif score >=70.0: 
        return "C"
    elif score >=60.0: 
        return "D"
    else:
        return "F"
    
print get_letter_grade(get_average(lloyd))

def get_class_average(students):
    students = ["lloyd","alice","tyler"]
    results=[]
    for student in students:
       get_average(students)
       results.append(get_average(student))
       return average(results)


#2

your students are not strings, they are variables of dictionary type , so in the above list you should skip the quotes ""
students = [lloyd,alice,tyler]


#3

@cawleye4gmail.com

No need of putting double quotes since the variables already exists.


#4

Thanks for pointing that out, made the change but still receiving same error message.


#5

I checked my task and I don't have this code line at all. Can you remove that line or at least move it outside from get_class_average(students) function definition?


#6

Yes, I got rid of it and also fixed get_average(students) to be get_average(student) so now my code looks like ...
def get_class_average(students):
results=[]
for student in students:
get_average(student)
results.append(get_average(student))
return average(results)

But now I receive this error message...

Oops, try again. get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected


#7

your code is correct , all i did that i move the list outside the function , so try it and reply to me

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

#8

Thanks for the help, I did as you said. I'm still receiving this error message "get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected"

It seems like for some reason it isn't calling tyler? Not sure...


#9

this is your code and it work for me !!!
can you see any diffrence ??

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)/len(numbers)
    return total
 
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests =  average(student["tests"])
    return (homework *.10) + (quizzes *.3) + (tests *.6)
    
def get_letter_grade(score):
    if score >=90.0: 
        return "A"
    elif score >=80.0: 
        return "B"
    elif score >=70.0: 
        return "C"
    elif score >=60.0: 
        return "D"
    else:
        return "F"
    
print get_letter_grade(get_average(lloyd))
students = [lloyd,alice,tyler]
def get_class_average(students):
    results=[]
    for student in students:
        results.append(get_average(student))
    return average(results)

#10

Hi can you try to put your students array outside the function get_class_average


#11

no difference! But I cut everything and pasted it back in and it worked perfectly. Who knows! Thanks for the help!


#12

beside that we move out the list , you can see that you forgot indentation for return average(results)
no thanks