leetcode:Rotate Array

Rotate Array

Input: [1,2,3,4,5,6,7] and k = 3
Output: [5,6,7,1,2,3,4]
Explanation:
rotate 1 steps to the right: [7,1,2,3,4,5,6]
rotate 2 steps to the right: [6,7,1,2,3,4,5]
rotate 3 steps to the right: [5,6,7,1,2,3,4]

def rotate(nums,k):
    n = len(nums)
    k = k % n
    nums[:] = nums[n-k:] + nums[:n-k]
    return nums
A = [1,2,3,4,5,6,7]
print(rotatearray(A,3))

理解Python运算符%：取模 - 返回除法的余数