384. Shuffle an Array

class Solution(object):

    def __init__(self, nums):
        """
        
        :type nums: List[int]
        :type size: int
        """
        self.__nums=nums
        

    def reset(self):
        """
        Resets the array to its original configuration and return it.
        :rtype: List[int]
        """
        return self.__nums

    def shuffle(self):
        """
        Returns a random shuffling of the array.
        :rtype: List[int]
        """
        nums=list(self.__nums)
        for i in xrange(len(nums)):
            j=random.randint(i,len(nums)-1)
            nums[i], nums[j] = nums[j] , nums[i]
        return nums
        


# Your Solution object will be instantiated and called as such:
# obj = Solution(nums)
# param_1 = obj.reset()
# param_2 = obj.shuffle()