Part of the Whole


#1



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


I have configured the code and it looks like the codes in the discussion that seem to run. I get a message:
Oops, try again. get_class_average([alice]) resulted in an error: 'NoneType' object is not utterable

it seems to relate to the last function but I cannot find what is wrong!


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)
    return total/len(numbers)
    
students=[lloyd,alice,tyler]

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


#2

Hello

The instructions state -

Make a variable homework that stores the average() of student["homework"].
Repeat step 2 for "quizzes" and "tests".
You created the three(3) variables - homework, quizzes and tests.
That part is done.

Multiply the 3 averages by their weights and return the sum of those three. Homework is 10%, quizzes are 30% and tests are 60%.

There is the key word - return. We want to do the last section in the return line.
Example -
return 0.1 * homework +....................

Hope that helps.


#4

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