Shuffle An Array

384. Shuffle an Array

import copy
import random


class Solution(object):
    def __init__(self, nums):
        self.ori = copy.copy(nums)
        self.nums = nums

    def reset(self):
        return self.ori

    def shuffle(self):
        for i in range(len(self.nums)):
            pos = random.randrange(i, len(self.nums))
            self.nums[i], self.nums[pos] = self.nums[pos], self.nums[i]
        return self.nums