How can you "generate" variables here?

Question

pygame

Here's the code:
https://pastebin.com/sWXxgRSu
I'm implementing a collision system in my game and noticed that since I have a lot of blocks I need to create a lot of pygame.Rect variables.
How can you efficiently "generate" variables so that you don't have to create a bunch of pygame.Rect variables beforehand so that you can interact with them later?

Answer 1

Random (module random).