On 22/10/15 10:03, Vusa Moyo wrote:
Hi Guys. Thanks for the responses and assistance.
I came right after-all. The last 2 blocks read the following.
Glad you are happy but there is still something you could improve:
def get_class_average(students):
results = []
for a in students:
b = float(get_average(a))
You really don't need the float() here. get_average() is guaranteed
to return a float.
results.append(b)
return average(results)
students = [lloyd, alice, tyler]
print(get_class_average(students))
bother = get_class_average([lloyd, alice, tyler])
print(get_letter_grade(bother))
Worked like a charm.
Thanks for the assistance.
Regards
Vusa
On Tue, Oct 20, 2015 at 2:38 PM, Alan Gauld <alan.ga...@btinternet.com
<mailto:alan.ga...@btinternet.com>> wrote:
On 20/10/15 12:29, Vusa Moyo wrote:
Hi there. My script is as follows,
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
# Add your function below!
def average(numbers):
> total = sum(numbers)
> total = float(total)
That line isn't necessary since the inputs are floats already.
> total = total / len(numbers)
> return total
>
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"
print get_average(lloyd)
def get_class_average(students):
results = []
for a in students:
b = int(get_average(a))
results.append([b])
return results
get_class_average(alice)
I receive a zero value for results, which doesnt quite make
sense to me.
Nor to me. Are you sure its a zero result? It should be a list of
some kind not a number. Or do you mean you get an empty list back?
Notice that get_class_average() expects your students value to be
some kind of sequence or collection. The for loop will iterate
over that. If you pass Alice as a single student it will iterate
over the keys, trying first of all to get the average of "Alice"
which should fail with an error. Did you get any errors? If so
please let us see them.
Please show us the actual code you execute, the actual output
and the full text of any errors.
One other thing that seems weird to me is that you go to great
pains to produce a float as a result of get_average() but then you
immediately convert it to an int. Why not leave it as a float?
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor
