Reverse Indexing in Python?
python
Solution
You can assign your variable to `None`:
>>> a = range(20)
>>> a[15:None:-1]
[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
>>>
Problem
I know that a[end:start:-1] slices a list in a reverse order. For example ``` a = range(20) print a[15:10:-1] # prints [15, ..., 11] print a[15:0:-1] # prints [15, ..., 1] ``` but you cannot get to the first element (0 in the example). It seems that -1 is a special value. ``` print a[15:-1:-1] # prints [] ``` Any ideas?