** How can I print the return index1,index2? I try different ways but nothing was printed out. **
class Solution:
    def twoSum(self, nums, target):
        nums = [2,7,11,15]
        target = 9
        hash_map = {}
        for index, value in enumerate(nums):
            hash_map[value] = index
        for index1, value in enumerate(nums):
            if target - value in hash_map:
                index2 = hash_map[target - value]
                if index1 != index2:
                    return [index1,index2]
 
     
    