I wrote my own implementation of the ECS pattern:
https://github.com/ikvk/ecs_pattern
https://pypi.org/project/ecs-pattern/
And I used it to create an example: the Pong game.
The game uses pygame and my ecs_pattern library.
https://github.com/ikvk/ecs_pattern/tree/master/examples/pong
Try ecs_pattern in action!
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Dear author of this lib, I hope for your understanding. No offense ;-)