Hi Obyilmaz,

Your post is not clear to me about what you are actually trying to do

and what result you expected. It would help a lot if you show the result

you are hoping to get.

What error did you get? I hope it is not a secret *wink*

I’m going to *guess* that what you want to do is take the first number

from T and the first number from L, and calculate a result from them.

Then take the second number from T and the second number from L, and

calculate another result, and so on. Is that what you want?

If it is, you can do it like this:

```
results = []
for x, y in zip(L, T):
results.append(calcg1(x, y))
```

The `zip()`

function goes through the two lists, L and T, and collects

one item from each. Then those two values get assigned to x and y.

Then it calls your function `calcg1()`

with the x and y, and appends the

result in the list `results`

.

We can do the same thing in one line like this:

`results = [calcg1(x, y) for x,y in zip(L, T)]`

Does that help?