Reversing a list using slice notation

Question

in the following example:

foo = [\'red\', \'white\', \'blue\', 1, 2, 3]

where: foo[0:6:1] will print all elements in foo. Howe

Answer 1

Complement. to reverse step by 2:

A = [1,2,2,3,3]
n = len(A)
res = [None] * n
mid = n//2 + 1 if n%2 == 1 else n//2

res[0::2] = A[0:mid][::-1]
res[1::2] = A[0:mid][::-1]
print(res)

[2, 3, 2, 3, 1]