8. Part of the Whole


#1

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

Hello, can I ask why this results in error 'get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected'?

That 91.15 is actually Alice's own average, not the class'. So supposedly 83.867 is correct (although I did not really calculate it manually).

def average(numbers):
    total=sum(numbers)
    total=float(total)
    total=total/len(numbers)
    return total
    
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))
classlist=[lloyd, alice, tyler]

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

8. part of whole
#4

4 posts were split to a new topic: 8. part of whole


#5

Hey @grassis,

I think this is not your full code, could you include all of the code in your editor?


#6

I think your main issue is that your definition argument doesn't match that of your for statement. For example:

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

rather than

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


#7

Still not working after changing the "classlist" as "students"
and here is my full program

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]
}

students=[lloyd,alice,tyler]

def average(numbers):
total=sum(numbers)
total=float(total)
result=total / len(numbers)
return result
def get_average(student):
homework=average(student["homework"])
quizzes=average(student["quizzes"])
tests=average(student["tests"])
sum=0.1*homework + 0.3*quizzes + 0.6*tests
return sum
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"
result=get_letter_grade(lloyd)
print result
def get_class_average(student):
results=[]
for student in students:
x=get_average(student)
results.append(x)
return average(results)
print get_class_average(lloyd)


#8

Hi Sujidha,

Thanks! This code works perfectly.


#9

It is working, thankx :slight_smile:


#10

thank u its wrong .......