2-1（续）

 1 class Solution(object):
 2     def twoSum(self, nums, target):
 3         if len(nums) <= 1:
 4             return False
 5         buff_dict = {}
 6         for i in range(len(nums)):
 7             if nums[i] in buff_dict:
 8                 return [buff_dict[nums[i]], i]
 9             else:
10                 buff_dict[target - nums[i]] = i