# 8. Part of the whole

#1

I get the following error when I run my code in the lesson : `Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected` I would love some input from you all!!

``````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]
}

# Function calculating average number grades
def average(numbers):
total = sum(numbers)
total = float(total)
result = total / len(numbers)
return result
# Function calculating the total # average of all students
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
total = .10 * average(student["homework"]) + \
.30 * average(student["quizzes"]) + \
.60 * average(student["tests"])

if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
return "F"

school_class = (lloyd, alice, tyler)

#Function calculating class average
def get_class_average(students):
results = []
for student in school_class:
results.append(get_average(student))
return average(results)``````

#2

your function should work for a class of student of any size (1, 2 or 3 students)

see the function call in the error message? lets add this to your code:

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

print get_class_average([alice])``````

see how it return the average for 3 students? Not just one?

the answer to solving this mystery has to do with function parameter and your for loop (what you are looping over)

#3

I believe the name of your list with the names of the students should have the same name as the argument in your get_class_average function. Also note that list should use the [ ] brackets and not ( ).

#4

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