LeetCode Two Sum

def twoSum(nums, target):    d={}    L = []    for i in range(len(nums)):        if (nums[i] in d):            L.append(d[nums[i]])            L.append(i)        else:            d[target-nums[i]] = i    return L       if __name__ == "__main__":    nums=[2,7,11,15]    target = 9    print twoSum(nums,target)