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.

Python Python Basics (Retired) Putting the "Fun" Back in "Function" Functions

Parvinder Grewal
Parvinder Grewal
3,678 Points

Summation from a python list

I can't see my error, I'm trying to add the integers passed in from the list.

Alternatively I tried using the sum() function but could not pass the test:

def add_list(numlist):
    total = sum(numlist)
    return total

[MOD: added ```python formatting -cf]

2 Answers

Chris Freeman
Chris Freeman
Treehouse Moderator 68,064 Points

You posted code does pass Task 1. Alternately you could loop over the input list:

def add_list(lst):
    count = 0
    for item in lst:
        count = count + item
    return count
Parvinder Grewal
Parvinder Grewal
3,678 Points

Hey Chris Freeman , thanks for the help. I did not initialize the count to 0. Passed the test now.