Intersection of Two Arrays

Given two arrays, write a function to compute their intersection.

Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].

Note: Each element in the result must be unique. The result can be in any order.

URL: https://leetcode.com/problems/intersection-of-two-arrays/

class Solution(object):
    def intersection(self, nums1, nums2):
        """
        :type nums1: List[int]
        :type nums2: List[int]
        :rtype: List[int]
        """
        nums1 = sorted(nums1)
        nums2 = sorted(nums2)
        intersection = {}
        i = 0
        j = 0
        while i < len(nums1) and j < len(nums2):
            if nums1[i] < nums2[j]:
                i += 1
            elif nums2[j] < nums1[i]:
                j += 1
            else:
                intersection[nums1[i]] = nums1[i]
                i += 1
                j += 1

        return intersection.keys()