9. How is Everybody Doing? - letter grade problem


#1

Hello there,
I'm stuck on this exercise:

https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096

The error message is "Oops, try again. Did you remember to print the letter grade for the class's average?"

I see the issue, I'm getting a letter grade result of "A" instead of "B", but I'm not sure why. I am passing the results to the get_letter_grade function, and I do get the correct class average (83.8666666667)

So this should be showing a "B" letter grade, not "A".

Here is my full 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)
    avg = total / len(numbers)
    return avg
    
def get_average(student):
    homework = average(student["homework"]) * 0.10
    quizzes = average(student["quizzes"]) * 0.30
    tests = average(student["tests"]) * 0.60
    
    return homework + quizzes + 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"
        

students = [lloyd, alice, tyler]

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

The result when this runs is:

83.8666666667
A

Thanks


#2

this is wrong as get_letter_grade() expects from you to receive an average = single grade and not a list of grades = results.
2nd, move the 2 print commands out of get_class_average() function and place in new lines of your code at the bottom. then you have too correct them - please read instructions again very carefully :slight_smile:


#3

ah thank you!

Works now, here's the last two parts re-written for anyone else who was struggling with this:

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

#4

Help Please! This(1) still does not work! I am adding another option(2) which also doesn't work!
1)
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]
}

def average(numbers):
total = sum(numbers)
total = float(sum(numbers))
return total/len(numbers)
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(llyod))

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

2)

students = [llyod, alice, tyler]
print get_class_average([llyod, alice, tyler])
print get_letter_grade(get_class_average([llyod, alice, tyler]))

Erros is as follows:

Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade


#5

Try removing the

get_average(student)

from your get_class_average function from code #1 .

Also, make sure the return from the function is indended on the same line as the for loop.
It should not be indended on the same par as the append.


#6

i do like this and i get error -- Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade


#7

Please post your code the image is unclear.


#8

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

print get_class_average(students)
print get_letter_grade(result)


#9

A very common error is indentation. So try indenting your code like this first.

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

#10

no sorry . what I'm need is that =
print get_class_average(students)
print get_letter_grade(result)

before it it's good


#11

Before all your functions have you stored all the students in a global list like so,

students = [lloyd, alice, tyler]


#12

oh...thanks now its work
when i set -

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


#13

Great glad I could help! :grin: