With judicious use of generators, and with itertools [0] when needed, they can be quite efficient for not much effort. And these are flexible tools that you ca

With judicious use of generators, and with itertools [0] when needed, they can be quite efficient for not much effort. And these are flexible tools that you can take with you across projects. [0] https://docs.python.org/3/library/itertools.html https://docs.python.org/3/library/itertools.html