'8. Part of the Whole' Second Try


#1

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)
total /= len(numbers)
return total
def get_average(student):
homework = average(student["homework"]) * 0.1
quizzes = average(student["quizzes"]) * 0.3
tests = average(student["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(get_average(lloyd))

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

It says:
Oops, try again.
get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected

Can someone tell me where the error happened?
If you do, thanks!


#2

Your final return statement:

return average(results)

should be inside your get_class_average function but not inside your for function:

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

#3

I've managed like this: but think that there's a bug within script
def get_class_average(students):
results = []
for s in students:
results.append(get_average(s))
return average(results)`

but think that there's a bug within script, as same result should be provided without loop as well, like this:
def get_class_average(students):
results = []
results.append(get_average(lloyd))
results.append(get_average(alice))
results.append(get_average(tyler))
return average(results)

(dont know why there is no whitespaces in below code, when I copy/paste...)


#4

Well, no not necessarily. A for loop just repeats itself over and over again, its a shortcut to use instead of writing repeated code.

It also accepts the second answer because it is just like a for loop, just written out the long way instead of using the shortcut.