please change the name of the function in the tests as it does not match the description. I had to change it manually

OP solved it in a ugly way... closing!

correct

This code is wrong: it returns a list, but it should return a single string.

Closing as per not enough details to address the issue.

Решение через генераторы работает отлично, но не принимается

This comment has been deleted.

There's no needle passed to the function - only a haystack.

OP solved it, closing

Read this: https://docs.codewars.com/training/troubleshooting#expected-the-same

Sounds like an infinite loop.

Please use appropriate markdown formatting when posting code. See https://docs.codewars.com/training/troubleshooting#post-discourse.

This return the correct answer but it says it's wrong.

No, your function doesn't return the correct answer. See https://docs.codewars.com/training/troubleshooting#.print-vs-return and https://docs.codewars.com/training/training-example#writing-a-solution.