First of all, when I run the solution given by codecademy, there’s a error “TypeError: list indices must be integers, not float”.

Secondly, below is my code, and it says invalid syntax in line 10 `return result`

. What could possibly go wrong with this? Besides, is the `int()`

necessary since we already know the number inside a[ ] must be an integer? Finally, codecademy tells me that this code turns out to be 4 instead of the correct number 4.5. I have no clue which part is wrong. Please help! Thanks a lot.

```
def median(a):
a = sorted(a)
amount = 0
for item in a:
amount = amount + 1
if amount % 2 != 0:
result = a[int((amount+1)/2-1)]
else:
result = (a[int((amount/2)-1)]+a[int(amount/2)]/2
return result
a = [4,5,5,4]
print(median(a))
```