Ignore all the negative elements, and only use positive elements to calculate average.

```
ave_pos([3, -3, 4, 0, 2, -1]) = 3

```

Here is what I have so far and I am completely lost on why it's not working!

```
def ave_pos(nums):
    avg = 0 
    for x in nums:
       if x > 0:
           avg = avg + x
    return avg

```