Python - Find the two numbers in a list that add up to a specific target number

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice.
Example:
Given nums = [2, 7, 11, 15], target = 9,
Because nums[0] + nums[1] = 2 + 7 = 9, return [0, 1]

class Solution:

    def twoSum(self, nums, target):

        for n in nums:

            for m in nums[nums.index(n):]:

                if n+m==target:

                    return nums.index(n), nums.index(m)

obj = Solution()

print(obj.twoSum([2,7,11,15], 26))

OUTPUT
(2, 3)

Comments

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