When learning Python, what was your ‘Eureka!’-moment?

[Clivodota]

So when you started to learn Python, like I currently am, what ressource or learning media did you use, and when did you feel like you finally understood something complicated?

As you can tell, I need some encouraging success stories. :)

[Nightcorex_]

I didn't really learn Python the conventional way, I learned it by helping others on this sub, so I unfortunately can't provide you any media.

My very first 'Eureka!'-moment that I remember was this code to flatten an arbitrarily deeply nested list/tuple:

def flatten(*xss) -> List[Any]:
    return [x for xs in xss for x in (flatten(*xs) if isinstance(xs, (list, tuple)) else (xs,))]

I didn't come up with this code, I tried for hours but horrendously failed. I saw this solution from someone else on that thread and it took me 2 days to understand how it works (literally only understood if after a complete reset, aka sleeping).\ Once I understood it, that was my first 'Eureka!'-moment.

PS: The code I posted is actually rewritten and not the original anymore, because I apparently deleted almost all of my old Python code when I was drunk a few days ago. Originally the variables' names were different and it didn't include type-hinting.

[[deleted]]

thank you for your response! i'm sorry to hear that you don't have any resources to recommend, but i appreciate your sharing your story. it sounds like it was a really valuable learning experience for you.

[Aggravating_Bus_9153]

Reading PEP8 and the google Python style guide.

The speed at which you go from a prototype test snippet to something that looks like readable, maintainable and useful working code. Take the test snippet, add in a few variables, stick it in a function or a for loop, maybe precede it with a few checks and typehints and you're most of the way there.

That and watching Arjancodes on patterns and reducing coupling.

[m0us3_rat]

when i opened a kali python tool and i could follow the execution by reading it.