Hello,

Could someone explain what I am doing wrong here? I thought it out logically and am stumped at my errors. Thank you!

Challenge:

Create a function named

`double_index`

that has two parameters: a list named`lst`

and a single number named`index`

.The function should return a new list where all elements are the same as in

`lst`

except for the element at`index`

. The element at`index`

should be double the value of the element at`index`

of the original`lst`

.If

`index`

is not a valid index, the function should return the original list.

Code:

```
#Write your function here
def double_index(lst, index):
if lst[index] > len(lst):
return lst
else:
replace = (lst[index] * 2)
new = lst[:lst[index]] + lst(replace) + lst[lst[index] + 1:]
return new
#Uncomment the line below when your function is done
print(double_index([3, 8, -10, 12], 2))
```

Error:

"TypeError: List object is not callable