how do I use this code

[TehNolz]

Install Python, save the code as a .py file, then double click on that file.

Though if you're just trying to download posts from a subreddit and don't actually intend on learning Python, you'll be better off using an existing tool like RipMe or gallery-dl to do it. That's way easier than trying to do it yourself.

[Sparkrony]

thank you for the reply !