text: class Solution:
      def twoSum(self, nums, target):
          """
          :type nums: List[int]
          :type target: int
          :rtype: List[int]
          """
          search_table = {}        
          for index, num in enumerate(nums):
              try:
                  return [index, search_table[target - num]]
              except KeyError:
                  search_table[num] = index
  