Please help! Not sure why I am getting the error message


#1



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

I am not getting any compilation error only the below error message from codeacademy:
Oops, try again. get_class_average([alice]) should return a number

Output for my code is:
[80.55, 91.14999999999999, 79.9]


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):
    hw_avg = average(student["homework"])
    q_avg = average(student["quizzes"])
    t_avg = average(student["tests"])
    print hw_avg
    print q_avg
    print t_avg
    weighted_avg = 0.1 * hw_avg + 0.3 * q_avg + 0.6 * t_avg
    print weighted_avg
    return weighted_avg
    
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"

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

students = [lloyd, alice, tyler]
print get_class_average(students)


#2

you might be over thinking it....
try:

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"


#3

Your function get_class_average(students) have to return average of results of all students
But you're returning list average marks list of individual students!

hint**

another hint...

# a function that returns average
# z is a list
def avg(z):
    t = 0
    for i in z:
        t += i
   return float(t) / len(z)

# a function that uses average and returns 1/5th of average
# m is a list
def avg_fifth(m):
   return avg(m)/5

x = [1,2,3]

avg_fifth(x)

Your mistake while writing second function you returned m/5 instead of avg(m)/ 5.

I hope it helps!


#4

Hi,

The get_average function in my code gets the weighted avg of each student. So the result list contains the weighted avg of each student. The calculations are correct.
While if I print the individual weighted avg of each student I get:
80.55
91.15
79.9
but when I print the list called result I get this:
[80.55, 91.14999999999999, 79.9]
:frowning:


#5

Hi...Thank you!!!
I now get it where I was wrong.


#6

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