9. How is Everybody doing?


#1



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


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 = float(sum(numbers))
    avg = total / len(numbers)
    return avg
    
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:
        avrg = get_average(student)
        results.append(avrg)
    return average(results)
    
    
stds = [lloyd, alice, tyler]
a = get_class_average(stds)
print a
print get_letter_grade(a)


#2

stds is not students
I would change this to students and change the argument here:

to students as well.


#3

Thanks! That actually worked.
But after changing "students" back to "stds" and running the code again, it worked too. Maybe its a bug.


#4

Hi, I have a problem with this part.
I get a pass on my code: "Congratulations, you've finished this course!", however i get errors in my output:

B
83.8666666667
Traceback (most recent call last):
File "python", line 55, in
File "python", line 27, in get_average
TypeError: list indices must be integers, not str

This is my 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) / len(numbers)
return total

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])

return 0.1 * average(student["homework"]) + 0.3 * average(student["quizzes"]) + 0.6 * average(student["tests"])

def get_letter_grade(score):
if score >= 90.0:
return "A"
elif score >= 80.0:
return "B"
elif score >= 70.0:
return "C"
elif score >= 60.0:
return "D"
else:
return "F"

print 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))
return average(results)

print get_class_average(students)
print get_letter_grade(get_average(students))

Thanks for any help! :slight_smile:


#5

The last line of the code you have written is giving the wrong result although the compilation is okay.

It should be print get_letter_grade(get_class_average(students)) and instead you have written print get_letter_grade(get_average(students)).

we have to take the average of the class not a single student


#6

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