how to run different python version

py -[version]

Here is what the above code is Doing:
1. It’s creating a new class called ‘Command’ that inherits from ‘BaseCommand’
2. It’s adding a ‘handle’ method to the class that takes in ‘self’, ‘*args’, and ‘**options’ as parameters
3. It’s printing out a message that says “Hello world. You’ve asked me to do stuff!”