iterating an interable sequence in reverse order [duplicate]

Answer 1

>>> def solution(lst):
...     dex = len(lst) - 1
...     while dex >= 0:
...         yield lst[dex]
...         dex -= 1
... 
>>> nums = solution([1, 2, 3, 4])
>>> next(nums)
4
>>> next(nums)
3
>>> next(nums)
2
>>> next(nums)
1
>>> next(nums)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
StopIteration