how to read json file

[snippsat]

A part of problem is that you struggle with basic understating of this
I gone explain in detail under here,if this don't work ask someone to help you local.

i tried to download from your link but after downloading it,i can not open it and my computer

There is no need to open data.json(then you can mess it up if save it),you shall just open colab then File --> New Notebook .
You copy is this code:

# test_read.py
import json
from pprint import pprint
 
with open("data.json", "r") as read_file:
    data = json.load(read_file)
 
pprint(data)

Then on Files left side menu,here you choice upload as in image.
Now find data.json on your hard-drive and upload.
Now push Run Cell button and it should work.

my computer say's look for appropriate program from internet to open such files also i tried to save my data.json

That because you have not JSON set to open in a program file associations.
This is is how it should be you can choice what you want eg basic notepad or better a basic editor like Notepad ++.

last post as .ipynd in file extension but some how that notepad file gets saved in .txt format only not sure what is wrong here.

You most be careful to save in notepad all will be .txt default,have to choice all files the type file name wanted and save.
Why to do talk about .ipynd,do as posted here,
after you get all to work you can download the Notebook the it will in .ipynd format.
Here have i downloaded it and share it with nbviewer My Notebook.