Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Mohd Maqbool Alam
Full Stack JavaScript Techdegree Student 5,715 PointsHelp python function challenge
what i am doing wrong help me but dont show me the solution.
# add_list([1, 2, 3]) should return 6
# summarize([1, 2, 3]) should return "The sum of [1, 2, 3] is 6."
# Note: both functions will only take *one* argument each.
def add_list(lst):
for x in lst:
total = sum(lst)
return total
def summarize(strlst):
for x in strlst:
total = sum(strlst)
return "The sum of"+" ".join(strlst)+"is:"+total
2 Answers

cm21
150,854 PointsHi there,
I recommend dropping the join method, and using curly braces to plug the values (specified as arguments of a format method for your string) into your return statement's string:
return "The sum of {} is {}.".format(strlst,total)
Hope this helps!

Kenneth Love
Treehouse Guest TeacherYou need to un-indent your return
statements. They're inside of your for
loops which means your loops won't be fully executed.