Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Jesse Mikkonen
Jesse Mikkonen
1,939 Points

So confused about this objective. What am I supposed to do, and where to start?

Make a function named add_list that takes a list. The function should then add all of the items in the list together and return the total. Assume the list contains only numbers. You'll probably want to use a for loop. You will not need to use input().

functions.py
# 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.

1 Answer

hi, here is the solution. and some discuss before.

https://teamtreehouse.com/community/make-a-function-named-addlist-that-takes-a-list-i-am-stuck-help

mylist = [1, 2, 3]

def add_list(mylist):
    total = 0
    for number in mylist:
        total = total + number
    return total

add_list(mylist)

if still confuse, visualization showing a Python program will help you.

just paste this code and see every step how it works. :)

http://www.pythontutor.com/