How to extract 'hello' from the following nested dictionary using indexing?

I completely understand why this question was downvoted. It's just basic knowledge that a Python tutorial would help you with.

Nevertheless, it would help you immensely if you'd reformat your code and make it more readable.

{
  "stairs_1":[
    1,
    "two",
    {
      "stairs_2":[
        "Close to the door",
        {
          "in the door":[
            "one",
            2,
            [
              "hello"
            ]
          ]
        }
      ]
    }
  ]
}

After looking at this code, you can see that the first level is a dictionary with a key stairs_1, its value is a list of three values.

The third value is a dictionary that contains just one element. Again, stairs_2 is the key and the value is a list, this time of two elements.

The second element is a dictionary that contains one element, its key is in the door and the value is a list.

The list contains three elements, while the third one is a list with a single element - your "hello" string.

So the answer is I_say['stairs_1'][2]['stairs_2'][1]['in the door'][2][0]