removing temp variable

rotate.py

import math

def rotate(array, steps):
    steps = steps % len(array)
    reverse(array, 0, len(array) - 1)
    reverse(array, 0, steps - 1)
    reverse(array, steps, len(array) - 1)
    return array

def reverse(array, start=0, end=None):
    if end is None:
        end = len(array) - 1

    for x in range((end - start) / 2):
        array[start + x], array[end - x] = array[end - x], array[start + x]
    return array