class py_solution:  
   def twoSum(self, nums, target):  
        lookup = {}  
        for i, num in enumerate(nums):  
            if target - num in lookup:  
                return (lookup[target - num] + 1, i + 1)  
            lookup[num] = i  
print("index1=%d, index2=%d" % py_solution().twoSum((10,20,10,40,50,60,70),50)) 