This article shows how you can install python3 on your windows system. first download python3 from official site. select windows installer it will start downloading.
After that click on installer. then click o install now and also mark option of Add Python 3.* to PATH by selecting this option you don’t need to add manually path to environment variable.
It will start installation process. wait for finishing it.
After that you can see installation is complete. Then click on Close.
After that you need to restart the window . Then you can verify python installation by typing