Thanks @hobovsky :) that makes sense!

Yes, about that since I am new here (literally couple of days). How does solution show here if it cannot run here? Can you post a solution here without running a solution? I don't see an option to post solution, I thought these are automatically added here once you have successfully solved a kata with that solution - if so then I don't see an option to choose python version.

Also why we need to mark a comment spoiler when discussing on a thread under a solution already out there? If anyone can see the solution, they can run it and see the error as well - I don't see I am adding anything here that could be flagged as spoiler.

That's the point, that extra adjustment is not required. Below would work just fine:

return sum(int(d) ** (i) for i, d in enumerate(str(a),1)) == a