https://leetcode-cn.com/problems/two-sum/submissions/ (opens new window)

class Solution(object):
    def twoSum(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: List[int]
        """
        hashmap = dict()
        for i, num in enumerate(nums):
            if(target-num in hashmap):
                return [hashmap[target-num], i]
            hashmap[num] = i