Adding the values of numbers in lists? (Python 3)

Question

I'm new to programming and I'm not sure how to do this. I have the following list:

marbles_in_bucket = [1, 1, 1, 1, 1, 1]

And I want to add, say, the value of index 1 to the value of index 2 to get 2. I tried to do this by writing marbles_in_bucket[1 + 2] but I got IndexError: list index out of range . How would I go about this?

Answer 1

> marbles_in_bucket[1] + marbles_in_bucket[2]
2

You can also index with ranges like:

> sum(marbles_in_bucket[1:3])  # the end index is exclusive
2

Answer 2

Following should do it.

marbles_in_bucket[1] + marbles_in_bucket[2]

If you are running that in a loop and iterating till the end you may need to check that you don't overrun the list.