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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. # Problem with my Python code to make functions.

My code doesn't pass the second part of the quiz. Can anyone help?

Here's the question: Challenge Task 2 of 2

Now, make a function named summarize that also takes a list. It should return the string "The sum of X is Y.", replacing "X" with the string version of the list and "Y" with the sum total of the list.

Here's my code - the first part for 'def add_list(my_list):' works to add all numbers in my_list. I can't figure out how to make the 'summarize' function work.

```def add_list(my_list):
sum = 0
for num in my_list:
sum += num
return sum

def summarize(my_list)
return ("The sum of {} is {}.".format(' '.join(my_list),add_list(my_list)))
``` The parameter `my_list` does not have to be joined before used in formatting the string. Try:
```   return ("The sum of {} is {}.".format(my_list, add_list(my_list)))