8/9 Part of the Whole


#1



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

My code seems right, but for some reason get_class_average([alice]) returns as an infinite decimal instead of 91.15. When printing get_average(alice), however, it does print 91.15. The error message reads: "Oops, try again. get_class_average([alice]) should return a number".


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(total)
    average = total / len(numbers)
    return average
    
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"

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


#2

get_class_average should return an average of all the averages in the student list.


#3

@mattisse

In your "def get_class_average(students) " must return the average.
hint hint - use your "average function "


#4

hi all this is my code and i stucking here because am newbie :stuck_out_tongue:


#5

hi all this is my all code here :smile:

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)
total = total / len(numbers)
return total
def get_average(students):
homework=average(students['homework']) * .10
quizzes=average(students['quizzes']) * .30
tests=average(students['tests']) * .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"
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)


#6

HI you didn't close append()


#7

lool i miss him sorry bro :blush:


#8

It does do this, by filling the empty results list with the return of get_average(student).


#9

My question is about why get_class_average([alice]) isn't returning a number while the function get_average(alice) is...


#10

Well I "solved" it without really solving anything. Thanks!


#11
I know this is after you've Solve it but this might help look at the last function

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(d):
    homework = average(d['homework']) *0.1
    quizzes = average(d['quizzes']) *0.3
    tests = average(d['tests']) *0.6
    
    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'

print(get_letter_grade(lloyd))

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