Python delete all elements from a list that are on an odd index

I’m trying to delete all elements from a Python list that are on an odd index of the list. In my case, the result from len(elements) is 40, so I assume after deleting all odd indexes, the total length should be 20. I tried the following code:

indx = 0
for element in elements:
   if indx % 2 == 1:
      elements.remove(element)
   indx += 1

After this, the result of len(elements) is 27, shouldn’t it be 20 since I deleted half of the elements?

>Solution :

It may be easier to just recreate the list with the indexes you want, e.g., by using a slice:

elements = elements[0::2]