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

Could someone point me in the right direction...

I'm an task 1/2. I can make a function, but forgot how to ass lists. Could someone nudge me in the right direction.

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.

def add_list([]):

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 67,986 Points
  1. Add together list items using built-in function
result = sum( list )

2.Loop over items and add them to subtotal:

result = 0
for item in list:
    result += item

You will also need to have an argument in your function: def add_list(arg):

Combining all of this, you would have something like this:

def add_list(arg):
    result = sum(arg)
    return result

or combining the last two statements:

def add_list(arg):
    return sum(arg)

It's not really working. I don't think I fully get what your saying.

That really helped, thanks! Could you take a look at the second challenge. Here's my code. What arguments do I pass to .format

''

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(arg): return sum(arg)

def summarize(arg2): return "The sum of {} is {}".format

Chris Freeman
Chris Freeman
Treehouse Moderator 67,986 Points

The first argument would be the arg2. The second argument would be the sum which can be written as add_list(arg2). Putting those together you get:

def summarize(arg2):
    return "The sum of {} is {}".format(arg2, add_list(arg2))

Thanks for the help!!!!!!!