I used that approach to find the pieces.

241 Python completions

And how's that an issue?

It could work, but it's somewhat tricky to get it working with the added requirements. If you have some idea for it, you can give it a try.

messing the code has nothing to do either with messing the algo. Writing a mess doesn't mean it fails the logic...

you're the only one responsible for the mess in your code. This has nothing to do with the quality or the rank of the kata.

Don't really want to make them equal, since 1 and 0 is nice to work with but '.' and 'O' looks better.
I added some clarification in the description.
Thanks for the feedback!

Be careful about what you "actually" output: look at the way the tests are done in the sample tests, might be that the conversion to the error message is loosing some information. Like an empty inner list or something like that.

help us, help you... x/

• language?
• input?
• "error"... This could mean anything => failed test? or crash of the code? message?

you're basically saying "hey! look at my code!" while we cannot see it... x)

ohh.. i see..and i updated the solution also..
Thanks;

No, you are wrong..

one sum is for flattening list like if you do this sum([1,2,[2,3],4],[]) gives [1,2,2,3,4] kind of python feature

second sum is for actual sum

thanks (: credits for the idea go to https://github.com/Fun-Coding-Challenges/ada-lovelace-coding-challenge as stated in description

fixed

What exactly is this "strange error"?