What are the default values of start and stop in list slice? Do they change if the step is positive or negative?
For example:
a = [1,2,3,4,5,6]
print(a[::1])
>>> [1, 2, 3, 4, 5, 6]
Above code makes it look that default value of start and stop are 0 and len(a).
But if we use a step = -1
a = [1,2,3,4,5,6]
print(a[::-1])
>>> [5, 4, 3, 2, 1, 0]
Following python documenttation from https://docs.python.org/3/tutorial/introduction.html#strings
Slice indices have useful defaults; an omitted first index defaults to zero, an omitted second index defaults to the size of the string being sliced.
If that is the case we should get an empty list.
a = [1,2,3,4,5,6]
print(a[0:len(a):-1])
>>> []
a = "python"
a[0:len(a):-1]
>>>> ''
